US3461275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared quartz heater
Assignee: PYROTEL CORP
•
Filing: 1968-01-26
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Granted: 1969-08-12
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Expires: 1988-01-26
Abstract
No abstract record available.
Inventors
- 👤 Richard R Poole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:22
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/0095; H05B3/40; H05B3/42; H05B3/44; H05B2203/00; H05B2203/032
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1110532A
Cited
US2535268A
Cited
US2596837A
Cited
US2690491A
Cited
US2957154A
Cited
US3345448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-11 | 1973-02-10 | 1973-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-11 | 1977-02-10 | 1977-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-11 | 1981-02-10 | 1981-08-12 | $7700.00 | Window Closed / Lapsed |