Patent US2805559A successfully refreshed from Google Patents.
US2805559A
Expired / Lapsed
US
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Air conditioning apparatus
Assignee: Individual
•
Filing: 1954-01-14
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Granted: 1957-09-10
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Expires: 1974-01-14
Abstract
No abstract record available.
Inventors
- 👤 Samuel A B Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:22
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F1/00; F24F1/0007; F24F1/0035; F24F1/0038; F24F1/0043; F24F1/0057; F24F1/0083; F24F1/02; F24F1/03; F24F1/0314; F24F1/0358; F24F5/00; Y; Y02; Y02B; Y02B30/00; Y02B30/54; Y10; Y10S; Y10S261/00; Y10S261/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2170992A
Cited
US923437A
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US1332703A
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US1686935A
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US1721589A
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US1954949A
Cited
US2093825A
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US2238924A
Cited
US2170993A
Cited
US2216175A
Cited
US2479936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |