Patent US2498681A successfully refreshed from Google Patents.
US2498681A
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Method for winding
Assignee: Lock Joint Pipe Co
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Filing: 1945-10-15
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Granted: 1950-02-28
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Expires: 1965-10-15
Abstract
No abstract record available.
Inventors
- 👤 Philip R Hirsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:28
CPC Classifications
B; B21; B21F; B21F17/00; B28; B28B; B28B21/00; B28B21/56; B28B21/60; B28B21/62; B65; B65H; B65H81/00; B65H81/06; B65H81/08; B66; B66D; B66D1/00; B66D1/28; B66D1/30; B66D1/36; B66D1/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |