Patent US1267345A successfully refreshed from Google Patents.
Patent US2888845A successfully refreshed from Google Patents.
US2888845A
Expired / Lapsed
US
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Combination broach and drill collar for use in well drilling
Assignee: Individual
•
Filing: 1956-08-27
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Granted: 1959-06-02
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Expires: 1976-08-27
Abstract
No abstract record available.
Inventors
- 👤 Mcclinton John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:49
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/02; E21B17/00; E21B17/16; E21B17/22; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/896; Y10T408/905
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US188405A
Cited
US262885A
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USRE16061E
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US1701427A
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US1848128A
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US1858509A
Cited
DE574698C
Cited
US2572839A
Cited
US2698810A
Cited
US2727730A
Cited
US2786218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |