US3057418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jar tool for well operations
Assignee: Shaffer Tool Works
•
Filing: 1959-04-20
•
Granted: 1962-10-09
•
Expires: 1979-04-20
Abstract
No abstract record available.
Inventors
- 👤 Koppl Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:03
CPC Classifications
E; E21; E21B; E21B31/00; E21B31/107; Y; Y10; Y10S; Y10S285/00; Y10S285/922
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US719290A
Cited
US2059540A
Cited
US2182245A
Cited
US2618466A
Cited
US2891772A
Cited
US2819877A
Cited
US2835474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |