US2587893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe chuck
Assignee: Individual
•
Filing: 1949-08-08
•
Granted: 1952-03-04
•
Expires: 1969-08-08
Abstract
No abstract record available.
Inventors
- 👤 Whetstine B Pridy
- 👤 Robert C Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:10
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/006; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44068; Y10T279/00; Y10T279/12; Y10T279/1274; Y10T279/1283; Y10T279/19; Y10T279/1946
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1311665A
Cited
US2158058A
Cited
US2511827A
Cited
US1441088A
Cited
US1837688A
Cited
GB576150A
Cited
US2451705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |