US2557972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide-seat rowing apparatus
Assignee: Individual
•
Filing: 1946-07-10
•
Granted: 1951-06-26
•
Expires: 1966-07-10
Abstract
No abstract record available.
Inventors
- 👤 Nelson J Jewett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:04
CPC Classifications
B; B63; B63H; B63H16/00; B63H16/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US149913A
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US185032A
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US282855A
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US421080A
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US441534A
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US609956A
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FR420637A
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US1058855A
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US1223512A
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US1691396A
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GB513510A
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US2399500A
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US2463042A
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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) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |