Patent US2897337A successfully refreshed from Google Patents.
US2897337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiant ceiling heater
Assignee: Individual
•
Filing: 1957-08-12
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Granted: 1959-07-28
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Expires: 1977-08-12
Abstract
No abstract record available.
Inventors
- 👤 Robert D Schiff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:40
CPC Classifications
F; F24; F24C; F24C7/00; F24C7/06; F24C7/062; F24C7/065; F24C7/04; F24C7/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1416965A
Cited
US1484454A
Cited
US1630649A
Cited
GB305500A
Cited
GB314567A
Cited
US2467479A
Cited
US2512061A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |