Patent US2872159A successfully refreshed from Google Patents.
US2872159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reamer
Assignee: Individual
•
Filing: 1956-05-24
•
Granted: 1959-02-03
•
Expires: 1976-05-24
Abstract
No abstract record available.
Inventors
- 👤 Walter D Autry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:18
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/26; E21B10/28; E21B10/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1940415A
Cited
US2022101A
Cited
GB432696A
Cited
US2084430A
Cited
US2306492A
Cited
US2648247A
Cited
US2754716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-02 | 1962-08-04 | 1963-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-02 | 1966-08-04 | 1967-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-02 | 1970-08-04 | 1971-02-03 | $7700.00 | Window Closed / Lapsed |