Patent US2310222A successfully refreshed from Google Patents.
US2310222A
Expired / Lapsed
US
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Unit air conditioner
Assignee: Niagara Blower Co
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Filing: 1940-08-02
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Granted: 1943-02-09
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Expires: 1960-08-02
Abstract
No abstract record available.
Inventors
- 👤 Charles N Deverall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:42
CPC Classifications
A; A23; A23B; A23B4/00; A23B4/044; A23B4/052; F; F26; F26B; F26B21/00; F26B21/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-02-08 | 1946-08-10 | 1947-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-02-08 | 1950-08-10 | 1951-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-02-08 | 1954-08-10 | 1955-02-09 | $7700.00 | Window Closed / Lapsed |