US2829899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Work holding sleeve member
Assignee: DREWCO Corp
•
Filing: 1954-11-18
•
Granted: 1958-04-08
•
Expires: 1974-11-18
Abstract
No abstract record available.
Inventors
- 👤 Charles E Drew
- 👤 John T Cochran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:44
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/12; B23B31/20; B23B31/201; B23B31/202; B23B31/40; B23B31/4006; B23B31/4013; B23B2226/00; B23B2226/33; B23B2231/00; B23B2231/20; B23B2231/201; B23B2231/2021; Y; Y10; Y10T; Y10T279/00; Y10T279/10; Y10T279/1004; Y10T279/17; Y10T279/17411; Y10T279/17461; Y10T279/17478; Y10T279/34; Y10T279/3493
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1007132A
Cited
US2012826A
Cited
GB482766A
Cited
US2346706A
Cited
US2374245A
Cited
US2452184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |