US2492547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air compressor
Assignee: Individual
•
Filing: 1945-05-03
•
Granted: 1949-12-27
•
Expires: 1965-05-03
Abstract
No abstract record available.
Inventors
- 👤 Donald E Willard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:51
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/0005; F04B39/0016; F04B39/0094; F04B39/10; F04B39/1013; F04B39/102; F04B39/12; F04B39/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US93051A
Cited
US896902A
Cited
US1150977A
Cited
US1630799A
Cited
US1707796A
Cited
FR681109A
Cited
US1957526A
Cited
US2265971A
Cited
US2288596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |