US3397017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-rotating drill pipe protector
Assignee: Jackson Memorial Hospital
•
Filing: 1966-02-21
•
Granted: 1968-08-13
•
Expires: 1986-02-21
Abstract
No abstract record available.
Inventors
- 👤 John C Grant
- 👤 Jr Raymond G Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:08
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1042; E21B17/105; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7062
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1051086A
Cited
US2016077A
Cited
DE744068C
Cited
US2636787A
Cited
US2657101A
Cited
US2836447A
Cited
US2813697A
Cited
US2846016A
Cited
US2931440A
Cited
GB861400A
Cited
US3019063A
Cited
US3197262A
Cited
US3197263A
Cited
US3164216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |