US3513715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed changing mechanism
Assignee: Nat Bank & Trust Co Of Central
•
Filing: 1967-11-20
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Granted: 1970-05-26
•
Expires: 1987-11-20
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Whitfield
- 👤 National Bank And Pennsylvania
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:06
CPC Classifications
F; F16; F16H; F16H1/00; F16H1/02; F16H1/20; F16H1/22; F16H1/227; F16H1/28; F16H1/2809; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19628; Y10T74/20; Y10T74/20012; Y10T74/20018
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2899822A
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US1586309A
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US2386367A
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US2518708A
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US2764903A
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US2863324A
Cited
US2920497A
Cited
US2971407A
Cited
US3292460A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |