US2320757A
Expired / Lapsed
US
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Positive synchronizing coupling mechanism for power transmission
Assignee: HYDRAULIC COUPLINGS PATENTS LT
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Filing: 1940-07-31
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Granted: 1943-06-01
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Expires: 1960-07-31
Abstract
No abstract record available.
Inventors
- 👤 Sinclair Harold
- 👤 Clerk Robert Cecil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:09
CPC Classifications
F; F16; F16D; F16D23/00; F16D23/02; F16H; F16H3/00; F16H3/02; F16H3/08; F16H3/087; F16H3/093; F16H2200/00; F16H2200/003; F16H2200/0043; F16H2200/0082; F16H2200/0095; F16H3/14; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19251; Y10T74/19256; Y10T74/19274; Y10T74/19284; Y10T74/19372; Y10T74/19377; Y10T74/19386; Y10T74/194
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) | 1946-05-31 | 1946-11-30 | 1947-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-05-31 | 1950-11-30 | 1951-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-05-31 | 1954-11-30 | 1955-06-01 | $7700.00 | Window Closed / Lapsed |