Patent US2633070A successfully refreshed from Google Patents.
US2633070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning apparatus
Assignee: Individual
•
Filing: 1951-03-26
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Granted: 1953-03-31
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Expires: 1971-03-26
Abstract
No abstract record available.
Inventors
- 👤 Walter E Gillham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:56
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/0233; F28D1/024; F28F; F28F2250/00; F28F2250/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2038347A
Cited
US2078295A
Cited
US1832638A
Cited
US1995667A
Cited
US2000597A
Cited
US2188176A
Cited
US2140787A
Cited
US2363294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-30 | 1956-09-29 | 1957-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-30 | 1960-09-29 | 1961-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-30 | 1964-09-29 | 1965-03-31 | $7700.00 | Window Closed / Lapsed |