US2290874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Lawrence University
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Filing: 1941-06-04
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Granted: 1942-07-28
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Expires: 1961-06-04
Abstract
No abstract record available.
Inventors
- 👤 John H Graff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:01
CPC Classifications
F; F16; F16M; F16M13/00; F16M11/00; F16M11/02; F16M11/04; F16M11/043; F16M11/048; F16M11/06; F16M11/10; F16M11/20; F16M11/2007; F16M11/2014; F16M11/2021; F16M11/2028; F16M11/24; F16M2200/00; F16M2200/02; F16M2200/021; F16M2200/022; F16M2200/025; F16M2200/027
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) | 1945-07-27 | 1946-01-26 | 1946-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-07-27 | 1950-01-26 | 1950-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-07-27 | 1954-01-26 | 1954-07-28 | $7700.00 | Window Closed / Lapsed |