US2659964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making quartz-to-metal seals
Assignee: General Electric Co
•
Filing: 1948-08-30
•
Granted: 1953-11-24
•
Expires: 1968-08-30
Abstract
No abstract record available.
Inventors
- 👤 Power Ernest Benjamin
- 👤 Nelson Evan Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:41
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/32; H01J5/40; H01J5/42; H01J2893/00; H01J2893/0033; H01J2893/0034
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US893473A
Cited
US1271245A
Cited
US1293441A
Cited
US1722016A
Cited
US2177702A
Cited
US2163409A
Cited
US2267318A
Cited
US2291660A
Cited
US2244960A
Cited
US2292863A
Cited
US2409361A
Cited
US2387903A
Cited
US2488285A
Cited
US2492162A
Cited
US2504521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |