Patent US3449927A successfully refreshed from Google Patents.
US3449927A
Expired / Lapsed
US
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Shaft couplings
Assignee: GKN Service UK Ltd
•
Filing: 1967-03-22
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Granted: 1969-06-17
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Expires: 1987-03-22
Abstract
No abstract record available.
Inventors
- 👤 John Henry Field
- 👤 George Robertson Parkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:22
CPC Classifications
F; F16; F16C; F16C29/00; F16C29/04; F16C29/06; F16C29/068; F16C29/0692; F16C29/0695; F16C29/0697; F16C3/00; F16C3/02; F16C3/03; F16C3/035; F16D; F16D3/00; F16D3/02; F16D3/06; F16D3/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2198654A
Cited
US2452117A
Cited
GB679843A
Cited
US2696090A
Cited
US2810274A
Cited
US2908152A
Cited
US3143867A
Cited
US3318109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |