US2699847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quartz-to-metal seal
Assignee: General Electric Co
•
Filing: 1949-09-01
•
Granted: 1955-01-18
•
Expires: 1969-09-01
Abstract
No abstract record available.
Inventors
- 👤 Nelson Evan Herbert
- 👤 Weald Harrow
- 👤 Power Ernest Benjamin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:06
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1271245A
Cited
US1293441A
Cited
US1564690A
Cited
US1722016A
Cited
US2198769A
Cited
US2374546A
Cited
US2415412A
Cited
US2518944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-17 | 1958-07-19 | 1959-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-17 | 1962-07-19 | 1963-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-17 | 1966-07-19 | 1967-01-18 | $7700.00 | Window Closed / Lapsed |