Patent US4647548A successfully refreshed from Google Patents.
Patent US3598384A successfully refreshed from Google Patents.
US3598384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal vapor generators
Assignee: SAES Getters SpA
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Filing: 1969-09-10
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Granted: 1971-08-10
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Expires: 1989-09-10
Abstract
Abstract A particle free device for releasing a metal vapor comprising: a container having walls defining a chamber; an opening in at least one of said walls; a particulate, metal vapor releasing substance within the chamber; and a member within the chamber and adjacent to the opening whereby the opening is rendered permeable to metal vapor but impermeable to the particulate substance.
Inventors
- 👤 Mario Zucchinelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:26
CPC Classifications
C; C22; C22B; C22B5/00; C22B5/02; C22B5/16; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/243; H; H01; H01J; H01J9/00; H01J9/02; H01J9/12; H01J9/20; H01J9/38; H01J9/395
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
90 words
A particle free device for releasing a metal vapor, said device comprising: A. a container having continuous walls defining a chamber; B. the extremities of the walls juxtaposed parallel to one another defining an opening; C. a particulate metal vapor releasing substance within the chamber; and D. a member within the chamber and adjacent to the opening whereby the opening is rendered permeable to metal vapor but impermeable to the particulate substance wherein the chamber is completely filled with the metal vapor releasing substance which holds the member in place.
Claim 2
Dependent Claim
90 words
A particle free device for releasing a metal vapor, said device comprising: A. a container having continuous walls defining a chamber; B. the extremities of the walls juxtaposed parallel to one another defining an opening; C. a particulate metal vapor releasing substance within the chamber; and D. a member within the chamber and adjacent to the opening whereby the opening is rendered permeable to metal vapor but impermeable to the particulate substance wherein the chamber is completely filled with the metal vapor releasing substance which holds the member in place.
Claim 3
Dependent Claim
15 words
The device of claim 1 wherein the container is a material of high electrical resistance.
Claim 4
Dependent Claim
15 words
The device of claim 1 wherein the metal vapor is that of an alkali metal.
Claim 5
Dependent Claim
13 words
The device of claim 1 wherein the metal vapor is that of mercury.
Claim 6
Dependent Claim
13 words
The device of claim 1 wherein the metal vapor is that of barium.
Claim 7
Dependent Claim
26 words
The device of claim 1 wherein the metal vapor releasing substance is a mixture of an alkali metal chromate and a reducing agent for the chromate.
Claim 8
Dependent Claim
22 words
The device of claim 1 wherein the member is a wire having a diameter greater than the transverse dimension of the opening.
Claim 9
Dependent Claim
92 words
A particle free device for releasing a metal vapor, said device comprising: A. a container having continuous walls defining a chamber; B. the extremities of the walls juxtaposed parallel to one another defining an opening; C. a particulate metal vapor releasing substance within the chamber; and D. a wire within the chamber adjacent to the extremities of the walls, the wire having a diameter greater than the distance between the extremities of the walls wherein the chamber is completely filled with the metal vapor releasing substance which holds the wire in place.
Claim 10
Dependent Claim
92 words
A particle free device for releasing a metal vapor, said device comprising: A. a container having continuous walls defining a chamber; B. the extremities of the walls juxtaposed parallel to one another defining an opening; C. a particulate metal vapor releasing substance within the chamber; and D. a wire within the chamber adjacent to the extremities of the walls, the wire having a diameter greater than the distance between the extremities of the walls wherein the chamber is completely filled with the metal vapor releasing substance which holds the wire in place.
Claim 11
Dependent Claim
134 words
A particle free device for releasing an alkali metal vapor, said device comprising: A. a container having continuous walls of a rectangular sheet material of high electrical resistance defining a chamber; B. thE longitudinal extremities of the sheet material juxtaposed parallel to one another defining an opening; C. a metal vapor releasing substance in the chamber, said substance comprising an alkali metal chromate and a reducing agent for the chromate; and D. a wire within the chamber adjacent to the longitudinal extremities of the sheet material, the axis of the wire being parallel to the longitudinal extremities of the sheet, the diameter of the wire being greater than the distance between the extremities of the sheet wherein the chamber is completely filled with the metal vapor releasing substance which holds the wire in place.
Claim 12
Dependent Claim
134 words
A particle free device for releasing an alkali metal vapor, said device comprising: A. a container having continuous walls of a rectangular sheet material of high electrical resistance defining a chamber; B. thE longitudinal extremities of the sheet material juxtaposed parallel to one another defining an opening; C. a metal vapor releasing substance in the chamber, said substance comprising an alkali metal chromate and a reducing agent for the chromate; and D. a wire within the chamber adjacent to the longitudinal extremities of the sheet material, the axis of the wire being parallel to the longitudinal extremities of the sheet, the diameter of the wire being greater than the distance between the extremities of the sheet wherein the chamber is completely filled with the metal vapor releasing substance which holds the wire in place.
Claim 13
Dependent Claim
81 words
A particle free device for releasing a metal vapor, said device comprising; a container having walls defining a chamber; an opening in at least one of said walls; a particulate, metal vapor releasing substance within the chamber; and a member within the chamber and adjacent to the opening whereby the opening is rendered permeable to metal vapor but impermeable to the particulate substance wherein the chamber is completely filled with the metal vapor releasing substance which holds the member in place.
Claim 14
Dependent Claim
81 words
A particle free device for releasing a metal vapor, said device comprising; a container having walls defining a chamber; an opening in at least one of said walls; a particulate, metal vapor releasing substance within the chamber; and a member within the chamber and adjacent to the opening whereby the opening is rendered permeable to metal vapor but impermeable to the particulate substance wherein the chamber is completely filled with the metal vapor releasing substance which holds the member in place.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |