Patent US1656992A successfully refreshed from Google Patents.
US1656992A
Expired / Lapsed
US
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Reenforcing sleeve for tubular shafts
Assignee: Parkersburg Rig and Reel Co
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Filing: 1926-04-14
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Granted: 1928-01-24
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Expires: 1946-04-14
Abstract
No abstract record available.
Inventors
- 👤 Schwemlein William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:21
CPC Classifications
F; F16; F16C; F16C3/00; F16C3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-01-23 | 1931-07-25 | 1932-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-01-23 | 1935-07-25 | 1936-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-01-23 | 1939-07-25 | 1940-01-24 | $7700.00 | Window Closed / Lapsed |