Patent US2589137A successfully refreshed from Google Patents.
US2589137A
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US
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Arrowhead
Assignee: Individual
•
Filing: 1949-11-12
•
Granted: 1952-03-11
•
Expires: 1969-11-12
Abstract
No abstract record available.
Inventors
- 👤 James C Ramsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:53
CPC Classifications
F; F42; F42B; F42B6/00; F42B6/02; F42B6/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US11391A
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US1787683A
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US2182320A
Cited
GB514085A
Cited
US2350581A
Cited
US2373216A
Cited
US2370270A
Cited
US2504449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-11 | 1955-09-10 | 1956-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-11 | 1959-09-10 | 1960-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-11 | 1963-09-10 | 1964-03-11 | $7700.00 | Window Closed / Lapsed |