Patent US2604920A successfully refreshed from Google Patents.
US2604920A
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US
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Nontrap stone tread
Assignee: Bridgestone Firestone Inc
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Filing: 1950-01-03
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Granted: 1952-07-29
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Expires: 1970-01-03
Abstract
No abstract record available.
Inventors
- 👤 Charles C Kirby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:57
CPC Classifications
B; B60; B60C; B60C11/00; B60C11/03; B60C11/04; B60C11/042; B60C11/0306; B60C11/0309; Y; Y10; Y10S; Y10S152/00; Y10S152/90; Y10T; Y10T152/00; Y10T152/10
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) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |