US3516502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for explosive drilling of well bores
Assignee: Sunoco Inc
•
Filing: 1968-07-09
•
Granted: 1970-06-23
•
Expires: 1988-07-09
Abstract
No abstract record available.
Inventors
- 👤 John D Bennett
- 👤 Ford L Johnson
- 👤 Fred M Mayes
- 👤 John W Peret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:18
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1867832A
Cited
US2880965A
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US2836246A
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US2951680A
Cited
US3022729A
Cited
US3083778A
Cited
US3190372A
Cited
US3268017A
Cited
US3387672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |