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US2933800A
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Assignee: Individual
•
Filing: 1957-06-19
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Granted: 1960-04-26
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Expires: 1977-06-19
Abstract
No abstract record available.
Inventors
- 👤 John H Friden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:28
CPC Classifications
B; B28; B28D; B28D1/00; B28D1/02; B28D1/06; B28D1/062; B23; B23D; B23D67/00; Y; Y10; Y10T; Y10T29/00; Y10T29/44; Y10T408/00; Y10T408/23; Y10T408/65; Y10T74/00; Y10T74/18; Y10T74/18024; Y10T83/00; Y10T83/687; Y10T83/6905; Y10T83/699; Y10T83/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US341664A
Cited
US636476A
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US1172264A
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US1356556A
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US1694834A
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US2442009A
Cited
US2711653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |