US2770923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal glass-to-metal seal
Assignee: Corning Glass Works
•
Filing: 1951-09-04
•
Granted: 1956-11-20
•
Expires: 1971-09-04
Abstract
No abstract record available.
Inventors
- 👤 Robert H Dalton
- 👤 Raymond O Voss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:24
CPC Classifications
C; C03; C03C; C03C27/00; C03C27/02; Y; Y10; Y10T; Y10T403/00; Y10T403/21; Y10T403/217
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2210489A
Cited
US2419049A
Cited
GB583242A
Cited
US2521846A
Cited
US2549504A
Cited
US2534392A
Cited
GB625466A
Cited
GB634657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |