Patent US2899803A successfully refreshed from Google Patents.
US2899803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning apparatus
Assignee: —
•
Filing: —
•
Granted: 1959-08-18
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Expires: 1976-08-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:22
CPC Classifications
F; F24; F24F; F24F1/00; F24F1/0007; F24F1/0043; F24F1/005; F24F13/00; F24F13/22; F24F13/222; F24F1/0018; F24F1/0022; F24F1/0047; F24F1/0057; F24F1/0059; F24F1/0063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2307283A
Cited
US2292562A
Cited
US2324313A
Cited
US2600316A
Cited
US2686630A
Cited
US2697921A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |