US2666158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric projection lamp
Assignee: Polaroid Corp
•
Filing: 1951-07-12
•
Granted: 1954-01-12
•
Expires: 1971-07-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Dexter P Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:39
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/02; H01K1/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1206333A
Cited
US1800012A
Cited
US1726365A
Cited
US1863152A
Cited
US2419432A
Cited
US2464990A
Cited
US2479221A
Cited
US2497567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |