Patent US1818598A successfully refreshed from Google Patents.
Patent US2904711A successfully refreshed from Google Patents.
US2904711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Incandescent lamp
Assignee: GTE Sylvania Inc
•
Filing: 1957-04-26
•
Granted: 1959-09-15
•
Expires: 1977-04-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Sandford C Peek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:22
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1325254A
Cited
US1632578A
Cited
US1982067A
Cited
US2190313A
Cited
US2269845A
Cited
US2277193A
Cited
US2413006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |