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US2380386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning system
Assignee: Individual
•
Filing: 1942-05-09
•
Granted: 1945-07-31
•
Expires: 1962-05-09
Abstract
No abstract record available.
Inventors
- 👤 Robert B P Crawford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:58
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/002; F25B9/004; B; B61; B61D; B61D27/00; B61D27/0018
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) | 1948-07-30 | 1949-01-29 | 1949-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-07-30 | 1953-01-29 | 1953-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-07-30 | 1957-01-29 | 1957-07-31 | $7700.00 | Window Closed / Lapsed |