Patent US2256952A successfully refreshed from Google Patents.
US2256952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air compressor
Assignee: Individual
•
Filing: 1939-08-07
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Granted: 1941-09-23
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Expires: 1959-08-07
Abstract
No abstract record available.
Inventors
- 👤 Sappington Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:22
CPC Classifications
F; F04; F04B; F04B27/00; F04B27/08; F04B27/10; F04B27/1036; F04B27/1054; F04B39/00; F04B39/10; F04B39/1006; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296; Y10T74/18336
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) | 1944-09-22 | 1945-03-24 | 1945-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-09-22 | 1949-03-24 | 1949-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-09-22 | 1953-03-24 | 1953-09-23 | $7700.00 | Window Closed / Lapsed |