US2680492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air dehydration unit
Assignee: Individual
•
Filing: 1951-06-22
•
Granted: 1954-06-08
•
Expires: 1971-06-22
Abstract
No abstract record available.
Inventors
- 👤 Roger S Kopp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:41
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1411; F24F3/1423; F24F2003/1458; F24F2003/1464; F24F2203/00; F24F2203/10; F24F2203/1004; F24F2203/1032; F24F2203/104; F24F2203/1056; F24F2203/1068; F24F2203/108; F24F2203/1088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1482626A
Cited
US2053159A
Cited
US2115226A
Cited
US2219547A
Cited
US2541694A
Cited
US2507604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |