US2445723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber spring
Assignee: Bridgestone Firestone Inc
•
Filing: 1944-03-01
•
Granted: 1948-07-20
•
Expires: 1964-03-01
Abstract
No abstract record available.
Inventors
- 👤 Roy W Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:59
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/36; F16F1/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US7706A
Cited
GB134056A
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US1744551A
Cited
US2039758A
Cited
FR762631A
Cited
GB432304A
Cited
US2058623A
Cited
US2087156A
Cited
US2215743A
Cited
GB549020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-20 | 1952-01-19 | 1952-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-20 | 1956-01-19 | 1956-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-20 | 1960-01-19 | 1960-07-20 | $7700.00 | Window Closed / Lapsed |