Patent US2944756A successfully refreshed from Google Patents.
US2944756A
Expired / Lapsed
US
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Resilient facings for drum flanges
Assignee: Oil States Industries Inc
•
Filing: 1956-07-31
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Granted: 1960-07-12
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Expires: 1976-07-31
Abstract
No abstract record available.
Inventors
- 👤 Wilson John Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:43
CPC Classifications
B; B65; B65H; B65H75/00; B65H75/02; B65H75/04; B65H75/08; B65H75/14; B65H75/18; B65H2701/00; B65H2701/50; B65H2701/51; B65H2701/513; B65H2701/5134; B65H2701/514; Y; Y10; Y10S; Y10S242/00; Y10S242/903; Y10S242/914
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1894432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |