US2893253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable pitch pulley mechanism
Assignee: Preco LLC
•
Filing: 1956-09-27
•
Granted: 1959-07-07
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Expires: 1976-09-27
Abstract
No abstract record available.
Inventors
- 👤 Paul K Beemer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:15
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/32; F16H55/52; F16H55/56; F16H9/00; F16H9/02; F16H9/04; F16H9/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2181627A
Cited
US818047A
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US1241148A
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US1237866A
Cited
US2236355A
Cited
US2607235A
Cited
US2582067A
Cited
US2636396A
Cited
US2746816A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-06 | 1963-01-05 | 1963-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-06 | 1967-01-05 | 1967-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-06 | 1971-01-05 | 1971-07-07 | $7700.00 | Window Closed / Lapsed |