US3443144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared incandescent lamp
Assignee: GTE Sylvania Inc
•
Filing: 1964-12-31
•
Granted: 1969-05-06
•
Expires: 1984-12-31
Abstract
No abstract record available.
Inventors
- 👤 Robert W Freese Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:42
CPC Classifications
H; H01; H01K; H01K5/00; H01K5/02; H01K1/00; H01K1/18; H01K1/24; H01K1/28; H05; H05B; H05B3/00; H05B3/0033; H05B3/009
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2267118A
Cited
US2229962A
Cited
US3012167A
Cited
US2980820A
Cited
US3219872A
Cited
US3265923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-05 | 1972-11-04 | 1973-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-05 | 1976-11-04 | 1977-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-05 | 1980-11-04 | 1981-05-06 | $7700.00 | Window Closed / Lapsed |