Patent US2576549A successfully refreshed from Google Patents.
US2576549A
Expired / Lapsed
US
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Air-conditioning unit
Assignee: MARVEL INDUSTRIES
•
Filing: 1949-12-19
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Granted: 1951-11-27
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Expires: 1969-12-19
Abstract
No abstract record available.
Inventors
- 👤 Carl J Wagner
- 👤 Grant V Mack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:43
CPC Classifications
F; F24; F24F; F24F1/00; F24F1/02; F24F1/022; F24F1/027; B; B60; B60H; B60H1/00; B60H1/00457; B60H1/00464; Y; Y10; Y10S; Y10S62/00; Y10S62/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1921257A
Cited
US1825808A
Cited
US2115472A
Cited
US2106515A
Cited
US2115294A
Cited
US2475841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |