US2437808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1945-09-15
•
Granted: 1948-03-16
•
Expires: 1965-09-15
Abstract
No abstract record available.
Inventors
- 👤 Drettmann Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:42
CPC Classifications
A; A01; A01C; A01C3/00; A01C3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1703275A
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US2001803A
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US2304075A
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US2296827A
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US2339518A
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US2397303A
Cited
US2351104A
Cited
US2398964A
Cited
US2393435A
Cited
US2419493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-16 | 1951-09-15 | 1952-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-16 | 1955-09-15 | 1956-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-16 | 1959-09-15 | 1960-03-16 | $7700.00 | Window Closed / Lapsed |