Patent US2925787A successfully refreshed from Google Patents.
US2925787A
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Assignee: Individual
•
Filing: 1953-09-09
•
Granted: 1960-02-23
•
Expires: 1973-09-09
Abstract
No abstract record available.
Inventors
- 👤 Carl R Rubenstein
- 👤 Ralph W Spafford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:56
CPC Classifications
B; B61; B61L; B61L23/00; B61L23/002; B61L23/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2231174A
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US2349120A
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US2392417A
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US2401115A
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US2614506A
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US2620385A
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US2688931A
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US2688932A
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US2688933A
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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) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |