Patent US3586338A successfully refreshed from Google Patents.
Patent US2245295A successfully refreshed from Google Patents.
US2245295A
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US
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Cylindrical spring
Assignee: Transit Research Corp
•
Filing: 1938-12-23
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Granted: 1941-06-10
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Expires: 1958-12-23
Abstract
No abstract record available.
Inventors
- 👤 Emil H Piron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:33
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/36; F16F1/371; F16F1/3713; F16F1/373; F16F1/376; F16F1/42; F16F1/44; F16F1/445; Y; Y10; Y10T; Y10T403/00; Y10T403/45; Y10T403/451; Y10T403/453; Y10T403/455; Y10T403/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-06-09 | 1944-12-09 | 1945-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-06-09 | 1948-12-09 | 1949-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-06-09 | 1952-12-09 | 1953-06-10 | $7700.00 | Window Closed / Lapsed |