US2439833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for plugging wells
Assignee: Phillips Petroleum Co
•
Filing: 1945-07-03
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Granted: 1948-04-20
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Expires: 1965-07-03
Abstract
No abstract record available.
Inventors
- 👤 Cary R Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:05
CPC Classifications
D; D06; D06B; D06B23/00; D06B23/10; B; B60; B60C; B60C13/00; B60C13/02; B64; B64C; B64C25/00; B64C25/32; B64C25/40; C; C09; C09K; C09K8/00; C09K8/50; C09K8/504; C09K8/506; C09K8/508; C09K8/514
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2294078A
Cited
US2174027A
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US2331858A
Cited
US2331859A
Cited
US2343136A
Cited
US2336636A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-20 | 1951-10-20 | 1952-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-20 | 1955-10-20 | 1956-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-20 | 1959-10-20 | 1960-04-20 | $7700.00 | Window Closed / Lapsed |