Patent US1999729A successfully refreshed from Google Patents.
US3053503A
Expired / Lapsed
US
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Fluid drill
Assignee: FAIRFAX Mfg CO Inc
•
Filing: 1960-03-07
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Granted: 1962-09-11
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Expires: 1980-03-07
Abstract
No abstract record available.
Inventors
- 👤 Jr George R Kern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:42
CPC Classifications
B; B23; B23B; B23B45/00; B23B45/04; Y; Y10; Y10S; Y10S415/00; Y10S415/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE357117C
Cited
US2128157A
Cited
US2180993A
Cited
US2283314A
Cited
US2871562A
Cited
US2897596A
Cited
US2895738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |