US2709903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible couplings
Assignee: Blackstone and Co Ltd
•
Filing: 1951-12-18
•
Granted: 1955-06-07
•
Expires: 1971-12-18
Abstract
No abstract record available.
Inventors
- 👤 Hallewell George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:27
CPC Classifications
F; F16; F16D; F16D3/00; F16D3/02; F16D3/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1693765A
Cited
US1965742A
Cited
US2016154A
Cited
US2234443A
Cited
GB546487A
Cited
US2476894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-06 | 1958-12-06 | 1959-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-06 | 1962-12-06 | 1963-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-06 | 1966-12-06 | 1967-06-07 | $7700.00 | Window Closed / Lapsed |