US2915838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: OWEN PEWTHERS Manufacturing Co Inc
•
Filing: 1954-08-18
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Granted: 1959-12-08
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Expires: 1974-08-18
Abstract
No abstract record available.
Inventors
- 👤 Frank M Owen
- 👤 Charles W Pewthers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:36
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/08; E02F3/12; E02F3/14; E02F3/142; E02F3/086; E02F3/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1802106A
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GB361460A
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US1978733A
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US2274970A
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US2353685A
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US2594991A
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US2472892A
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US2607136A
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US2671282A
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US2667709A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |