US2721708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-centering toroidal core holding and driving fixture
Assignee: Individual
•
Filing: 1952-05-09
•
Granted: 1955-10-25
•
Expires: 1972-05-09
Abstract
No abstract record available.
Inventors
- 👤 Paul H Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:40
CPC Classifications
B; B65; B65H; B65H81/00; B65H81/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1219266A
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US1263923A
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US1451051A
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FR594091A
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DE462081C
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US1841609A
Cited
US1957068A
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US2249506A
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US2467643A
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US2441439A
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US2534130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |