US2737787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roof suspended air conditioner
Assignee: Individual
•
Filing: 1954-06-23
•
Granted: 1956-03-13
•
Expires: 1974-06-23
Abstract
No abstract record available.
Inventors
- 👤 Richard W Kritzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:25
CPC Classifications
F; F24; F24F; F24F1/00; F24F1/0007; F24F1/0043; F24F1/0047; Y; Y10; Y10S; Y10S62/00; Y10S62/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2180915A
Cited
US2232235A
Cited
US2303577A
Cited
US2475841A
Cited
US2443472A
Cited
US2500852A
Cited
US2682757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |