Patent US2933831A successfully refreshed from Google Patents.
US2933831A
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US
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Rubber footwear with expansion flap
Assignee: Tingley Rubber Corp
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Filing: 1956-11-30
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Granted: 1960-04-26
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Expires: 1976-11-30
Abstract
No abstract record available.
Inventors
- 👤 Compte Frank M Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:56
CPC Classifications
A; A43; A43B; A43B3/00; A43B3/02; Y; Y10; Y10T; Y10T24/00; Y10T24/36; Y10T24/45; Y10T24/45225; Y10T24/45602; Y10T24/45759; Y10T24/45775; Y10T24/45785
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1821471A
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US2552064A
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US2599116A
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US2709290A
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US2662308A
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US2725647A
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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 |