US2926837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power roof ventilator
Assignee: Trane Co
•
Filing: 1957-07-11
•
Granted: 1960-03-01
•
Expires: 1977-07-11
Abstract
No abstract record available.
Inventors
- 👤 Robert B Coe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:24
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/60; F04D29/62; F04D29/624; F04D29/626
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1863043A
Cited
US2096621A
Cited
US2258325A
Cited
US2332552A
Cited
US2571513A
Cited
US2666378A
Cited
US2795388A
Cited
US2774293A
Cited
US2823598A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |