Patent US2167878A successfully refreshed from Google Patents.
US2167878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning system
Assignee: Individual
•
Filing: 1936-02-19
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Granted: 1939-08-01
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Expires: 1956-02-19
Abstract
No abstract record available.
Inventors
- 👤 Crawford Robert Brace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:26
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/153; F24F5/00; F24F5/0007; F24F5/0046
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) | 1942-07-31 | 1943-01-30 | 1943-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-07-31 | 1947-01-30 | 1947-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-07-31 | 1951-01-30 | 1951-08-01 | $7700.00 | Window Closed / Lapsed |