US3876409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser fusion of glass electrodes
Assignee: General Electric Co
•
Filing: 1972-11-15
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Granted: 1975-04-08
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Expires: 1992-11-15
Abstract
Abstract A novel method of affixing a glass membrane to a glass electrode is described which employs a laser beam. The method is especially useful in the manufacture of glass pH electrodes and ionselective electrodes in general.
Inventors
- 👤 Lawrence David Sangermano
- 👤 William Lester Mowrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:50
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/20; Y; Y10; Y10S; Y10S65/00; Y10S65/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
15 words
A method as defined in claim 1 wherein the laser is a molecular gas laser.
Claim 2
Dependent Claim
17 words
A method as defined in claim 2 wherein the molecular gas laser is a carbon dioxide laser.
Claim 3
Dependent Claim
37 words
A method as defined in claim 1 wherein said glass membrane is selective for a cation selected from the group consisting of H.sup.+, Na.sup.+, Li.sup.+, Ag.sup.+, K.sup.+, Rb.sup.+, Cs.sup.+, NH.sub.4 .sup.+, Tl.sup.+, Mg.sup.+.sup.+, Ca.sup.+.sup.+, Sr.sup.+.sup.+ and Ba.sup.+.sup.+.
Claim 4
Dependent Claim
13 words
A method as defined in claim 1 wherein said glass membrane is flat.
Claim 5
Dependent Claim
36 words
A method as defined in claim 1 wherein said fusion sealing is effected by rotating the glass membrane and glass casing through an arc of at least 360.degree. in the path of said focused laser beam.
References Cited (Backward Citations)
US3217088A
Cited
US3471392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |