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US3076507A
Expired / Lapsed
US
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Chemical cutting method and apparatus for use in wells
Assignee: Individual
•
Filing: 1958-05-16
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Granted: 1963-02-05
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Expires: 1978-05-16
Abstract
No abstract record available.
Inventors
- 👤 William G Sweetman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:41
CPC Classifications
E; E21; E21B; E21B29/00; E21B29/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
8 words
THE METHOD OF CUTTING AN OBJECT HAVING METALLIC
References Cited (Backward Citations)
US2144208A
Cited
US2302567A
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US2451422A
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US2629445A
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US2571636A
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US2642656A
Cited
US2680486A
Cited
US2692023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |