US3879279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode with exchangeable membrane
Assignee: Schott AG
•
Filing: 1971-11-26
•
Granted: 1975-04-22
•
Expires: 1991-11-26
Abstract
Abstract An electrode for measuring ion activities having an electrode shaft divided into an upper portion and a lower portion. An ionsensitive membrane is held between the upper and the lower portions of the shaft. The outer surface of the membrane contacts the material whose ion activity is to be measured.
Inventors
- 👤 Friedrich Gustav Karl Baucke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:59
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/333
Claims Analysis
Total Claims: 68
Claim 1
Independent Claim
106 words
An electrode for measuring ion activities comprising: A. an electrode shaft divided into 1. an upper portion, and 2. a lower portion, B. an ion sensitivE membrane between the upper and lower portions of the shaft, wherein the membrane is in the form of an annular ring, the top of the ring forming a fluid tight seal with the upper portion of the electrode shaft, the bottom of the ring forming a fluid tight seal with the lower portion of the electrode shaft, C. means for pressing the upper and lower portions of the electrode shaft against the ring in order to maintain said fluid seals.
Claim 2
Dependent Claim
106 words
An electrode for measuring ion activities comprising: A. an electrode shaft divided into 1. an upper portion, and 2. a lower portion, B. an ion sensitivE membrane between the upper and lower portions of the shaft, wherein the membrane is in the form of an annular ring, the top of the ring forming a fluid tight seal with the upper portion of the electrode shaft, the bottom of the ring forming a fluid tight seal with the lower portion of the electrode shaft, C. means for pressing the upper and lower portions of the electrode shaft against the ring in order to maintain said fluid seals.
Claim 3
Dependent Claim
13 words
An electrode for measuring ion activities comprising: A. an electrode shaft divided into
Claim 4
Dependent Claim
13 words
An electrode for measuring ion activities comprising: A. an electrode shaft divided into
Claim 5
Dependent Claim
4 words
an upper portion, and
Claim 6
Dependent Claim
4 words
an upper portion, and
Claim 7
Dependent Claim
29 words
an upper flat surface having a plane adapted to form a fluid tight seal with the flat surface having a plane of the upper portion of the electrode shaft,
Claim 8
Dependent Claim
29 words
an upper flat surface having a plane adapted to form a fluid tight seal with the flat surface having a plane of the upper portion of the electrode shaft,
Claim 9
Dependent Claim
6 words
the lower portion of the shaft
Claim 10
Dependent Claim
6 words
the lower portion of the shaft
Claim 11
Dependent Claim
6 words
the upper portion of the shaft,
Claim 12
Dependent Claim
6 words
the upper portion of the shaft,
Claim 13
Dependent Claim
28 words
a lower flat surface having a plane adapted to form a fluid tight seal with the flat surface having a plane of the lower portion of the shaft,
Claim 14
Dependent Claim
28 words
a lower flat surface having a plane adapted to form a fluid tight seal with the flat surface having a plane of the lower portion of the shaft,
Claim 15
Dependent Claim
28 words
an upper flat surface having a plane adapted to form a fluid tight seal with the flat surface having a plane of the upper portion of the shaft,
Claim 16
Dependent Claim
28 words
an upper flat surface having a plane adapted to form a fluid tight seal with the flat surface having a plane of the upper portion of the shaft,
Claim 17
Dependent Claim
26 words
a hollow upper portion the lower extremity of which comprises a flat surface having a plane at right angles to the centerline of the electrode shaft,
Claim 18
Dependent Claim
26 words
a hollow upper portion the lower extremity of which comprises a flat surface having a plane at right angles to the centerline of the electrode shaft,
Claim 19
Dependent Claim
3 words
an upper portion,
Claim 20
Dependent Claim
3 words
an upper portion,
Claim 21
Dependent Claim
4 words
an upper portion, and
Claim 22
Dependent Claim
4 words
an upper portion, and
Claim 23
Dependent Claim
20 words
an upper planar surface forming a fluid tight seal with the planar surface of the upper portion of the shaft;
Claim 24
Dependent Claim
20 words
an upper planar surface forming a fluid tight seal with the planar surface of the upper portion of the shaft;
Claim 25
Dependent Claim
30 words
a hollow upper portion having: a. internal threads adjacent the lower extremity of the upper portion; b. a planar surface at right angles to the centerline of the electrode shaft;
Claim 26
Dependent Claim
30 words
a hollow upper portion having: a. internal threads adjacent the lower extremity of the upper portion; b. a planar surface at right angles to the centerline of the electrode shaft;
Claim 27
Dependent Claim
20 words
a lower planar surface forming a fluid tight seal with the planar surface of the lower portion of the shaft.
Claim 28
Dependent Claim
20 words
a lower planar surface forming a fluid tight seal with the planar surface of the lower portion of the shaft.
Claim 29
Dependent Claim
50 words
a lower portion having: a. a planar surface at right angles to the centerline of the electrode shaft; b. an externally threaded member engaging the internal threads of the upper portion; B. an ion sensitive membrane in the form of an annular ring surrounding the externally threaded member and having:
Claim 30
Dependent Claim
50 words
a lower portion having: a. a planar surface at right angles to the centerline of the electrode shaft; b. an externally threaded member engaging the internal threads of the upper portion; B. an ion sensitive membrane in the form of an annular ring surrounding the externally threaded member and having:
Claim 31
Dependent Claim
4 words
a lower portion, and
Claim 32
Dependent Claim
4 words
a lower portion, and
Claim 33
Dependent Claim
133 words
a lower portion, B. an ion sensitive membrane between the upper and lower portions of the shaft, wherein the membrane is in the form of an annular ring, the top of the ring forming a fluid tight seal with the upper portion of the electrode shaft, the bottom of the ring forming a fluid tight seal with the lower portion of the electrode shaft, C. means for pressing the upper and lower portions of the electrode shaft against the ring in order to maintain said fluid seals such that the membrane and the upper and lower portions of the shaft define a first chamber, D. a second chamber within the Upper portion of the electrode shaft, E. a sensing electrode in the first chamber, and F. a reference electrode in the second chamber.
Claim 34
Dependent Claim
133 words
a lower portion, B. an ion sensitive membrane between the upper and lower portions of the shaft, wherein the membrane is in the form of an annular ring, the top of the ring forming a fluid tight seal with the upper portion of the electrode shaft, the bottom of the ring forming a fluid tight seal with the lower portion of the electrode shaft, C. means for pressing the upper and lower portions of the electrode shaft against the ring in order to maintain said fluid seals such that the membrane and the upper and lower portions of the shaft define a first chamber, D. a second chamber within the Upper portion of the electrode shaft, E. a sensing electrode in the first chamber, and F. a reference electrode in the second chamber.
Claim 35
Dependent Claim
6 words
the intermediate portion of the shaft,
Claim 36
Dependent Claim
6 words
the intermediate portion of the shaft,
Claim 37
Dependent Claim
25 words
a lower portion the upper extremity of which comprises a flat surface having a plane at right angles to the centerline of the electrode shaft,
Claim 38
Dependent Claim
25 words
a lower portion the upper extremity of which comprises a flat surface having a plane at right angles to the centerline of the electrode shaft,
Claim 39
Dependent Claim
57 words
a lower flat surface having a plane adapted to form a fluid tight seal with the flat surface having a plane of the intermediate portion of the shaft, C. a second ion sensitive membrane between the lower and intermediate portions of the shaft wherein the membrane is in the form of an annular ring, said ring having:
Claim 40
Dependent Claim
57 words
a lower flat surface having a plane adapted to form a fluid tight seal with the flat surface having a plane of the intermediate portion of the shaft, C. a second ion sensitive membrane between the lower and intermediate portions of the shaft wherein the membrane is in the form of an annular ring, said ring having:
Claim 41
Dependent Claim
146 words
an upper flat surface having a plane adapted to form a fluid tight seal with the flat surface having a plane of the intermediate portion of the shaft, D. a tension shaft fixed to the lower portion of the electrode shaft and extending through the annulus of each ring, through and beyond the hollow upper portion of the electrode shaft and extending beyond the upper extremity of the upper portion of the electrode shaft, the end of the tension shaft having threads, E. a nut on the threads F. a force transmitting member slidably mounted on the tension shaft between the nut and the upper extremity of the upper portion of the electrode shaft, the force transmitting member extending laterally to contact and exert force on the upper extremity of the upper portion of the electrode shaft, wherein a first fluid tight chamber is defined by:
Claim 42
Dependent Claim
146 words
an upper flat surface having a plane adapted to form a fluid tight seal with the flat surface having a plane of the intermediate portion of the shaft, D. a tension shaft fixed to the lower portion of the electrode shaft and extending through the annulus of each ring, through and beyond the hollow upper portion of the electrode shaft and extending beyond the upper extremity of the upper portion of the electrode shaft, the end of the tension shaft having threads, E. a nut on the threads F. a force transmitting member slidably mounted on the tension shaft between the nut and the upper extremity of the upper portion of the electrode shaft, the force transmitting member extending laterally to contact and exert force on the upper extremity of the upper portion of the electrode shaft, wherein a first fluid tight chamber is defined by:
Claim 43
Dependent Claim
29 words
a lower flat surface having a plane adapted to form a fluid right seal with the flate surface having a plane of the lower portion of the electrode shaft,
Claim 44
Dependent Claim
29 words
a lower flat surface having a plane adapted to form a fluid right seal with the flate surface having a plane of the lower portion of the electrode shaft,
Claim 45
Dependent Claim
6 words
the intermediate portion of the shaft
Claim 46
Dependent Claim
6 words
the intermediate portion of the shaft
Claim 47
Dependent Claim
87 words
a lower portion, B. an ion sensitivE membrane between the upper and lower portions of the shaft, wherein the membrane is in the form of an annular ring, the top of the ring forming a fluid tight seal with the upper portion of the electrode shaft, the bottom of the ring forming a fluid tight seal with the lower portion of the electrode shaft, C. means for pressing the upper and lower portions of the electrode shaft against the ring in order to maintain said fluid seals.
Claim 48
Dependent Claim
87 words
a lower portion, B. an ion sensitivE membrane between the upper and lower portions of the shaft, wherein the membrane is in the form of an annular ring, the top of the ring forming a fluid tight seal with the upper portion of the electrode shaft, the bottom of the ring forming a fluid tight seal with the lower portion of the electrode shaft, C. means for pressing the upper and lower portions of the electrode shaft against the ring in order to maintain said fluid seals.
Claim 49
Dependent Claim
94 words
An electrode for measuring ion activities comprising: A. an electrode shaft divided into (1) a hollow upper portion the lower extremity of which comprises a flat surface having a plane at right angles to the centerline of the electrode shaft, (2) a lower portion the upper extremity of which comprises a flat surface having a plane at right angles to the centerline of the electrode shaft, B. an ion sensitive membrane between the upper and lower portions of the shaft wherein the membrane is in the form of an annular ring, said ring having:
Claim 50
Dependent Claim
94 words
An electrode for measuring ion activities comprising: A. an electrode shaft divided into (1) a hollow upper portion the lower extremity of which comprises a flat surface having a plane at right angles to the centerline of the electrode shaft, (2) a lower portion the upper extremity of which comprises a flat surface having a plane at right angles to the centerline of the electrode shaft, B. an ion sensitive membrane between the upper and lower portions of the shaft wherein the membrane is in the form of an annular ring, said ring having:
Claim 51
Dependent Claim
40 words
the second membrane; whereby turning the nut creates tension in the tension shaft and comression in the rings and the upper, the lower and the intermediate portions of the electrode shaft thereby maintaining the fluid tight integrity of the chambers.
Claim 52
Dependent Claim
40 words
the second membrane; whereby turning the nut creates tension in the tension shaft and comression in the rings and the upper, the lower and the intermediate portions of the electrode shaft thereby maintaining the fluid tight integrity of the chambers.
Claim 53
Dependent Claim
13 words
an outer surface substantially coextensive with the outer surface of the electrode shaft,
Claim 54
Dependent Claim
13 words
an outer surface substantially coextensive with the outer surface of the electrode shaft,
Claim 55
Dependent Claim
12 words
the first membrane; wherein a second fluid tight chamber is defined by:
Claim 56
Dependent Claim
12 words
the first membrane; wherein a second fluid tight chamber is defined by:
Claim 57
Dependent Claim
48 words
an intermediate portion having an upper flat surface having a plane and a lower flat surface having a plane B. a first ion sensitive membrane between the upper and intermediate portions of the shaft wherein the membrane is in the form of an annular ring, said ring having:
Claim 58
Dependent Claim
48 words
an intermediate portion having an upper flat surface having a plane and a lower flat surface having a plane B. a first ion sensitive membrane between the upper and intermediate portions of the shaft wherein the membrane is in the form of an annular ring, said ring having:
Claim 59
Dependent Claim
78 words
an intermediate portion; B. a first ion sensitive membrane between the upper and the intermediate portions of the shaft, and forming a first fluid tight chamber therewith; C. a second ion sensitive membrane between the lower and the intermediate portions of the shaft and forming a second fluid tight chamber therewith; D. means for axially compressing the two membranes and the three portions of the shaft in order to maintain the fluid tight integrity of the two chambers.
Claim 60
Dependent Claim
78 words
an intermediate portion; B. a first ion sensitive membrane between the upper and the intermediate portions of the shaft, and forming a first fluid tight chamber therewith; C. a second ion sensitive membrane between the lower and the intermediate portions of the shaft and forming a second fluid tight chamber therewith; D. means for axially compressing the two membranes and the three portions of the shaft in order to maintain the fluid tight integrity of the two chambers.
Claim 61
Dependent Claim
12 words
An electrode for measuring ion activities comprising: A. an electrode shaft comprising:
Claim 62
Dependent Claim
12 words
An electrode for measuring ion activities comprising: A. an electrode shaft comprising:
Claim 63
Dependent Claim
152 words
an inner surface adapted to contact an ionic solution within the shaft, C. a tension shaft fixed to the lower portion of the electrode shaft and extending through the annulus of the ring, through and beyond the hollow upper portion of the electrode shaft and extending beyond the upper extremity of the upper portion of the electrode shaft, the end of the tension shaft having threads, D. a nut on the threads, E. a force transmitting member slidably mounted on the tension shaft between the nut and the upper extremity of the upper portion of the electrode shaft, the force transmitting member extending laterally to contact and exert force on the upper extremity of the upper portion of the electrode shaft, whereby turning the nut creates tension in the tension shaft and compression in the ring and the upper and lower portions of the electrode shaft thereby maintaining said fluid tight seals.
Claim 64
Dependent Claim
152 words
an inner surface adapted to contact an ionic solution within the shaft, C. a tension shaft fixed to the lower portion of the electrode shaft and extending through the annulus of the ring, through and beyond the hollow upper portion of the electrode shaft and extending beyond the upper extremity of the upper portion of the electrode shaft, the end of the tension shaft having threads, D. a nut on the threads, E. a force transmitting member slidably mounted on the tension shaft between the nut and the upper extremity of the upper portion of the electrode shaft, the force transmitting member extending laterally to contact and exert force on the upper extremity of the upper portion of the electrode shaft, whereby turning the nut creates tension in the tension shaft and compression in the ring and the upper and lower portions of the electrode shaft thereby maintaining said fluid tight seals.
Claim 65
Dependent Claim
13 words
An electrode for measuring ion activities comprising: A. an electrode shaft divided into
Claim 66
Dependent Claim
13 words
An electrode for measuring ion activities comprising: A. an electrode shaft divided into
Claim 67
Dependent Claim
16 words
An electrode for measuring ion activities of two ions comprising: A. an electrode shaft divided into:
Claim 68
Dependent Claim
16 words
An electrode for measuring ion activities of two ions comprising: A. an electrode shaft divided into:
References Cited (Backward Citations)
US3216915A
Cited
US3591464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |