US2452736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating oil wells
Assignee: CHARLES M MCKNIGHT
•
Filing: 1945-08-28
•
Granted: 1948-11-02
•
Expires: 1965-08-28
Abstract
No abstract record available.
Inventors
- 👤 Allen G Eickmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:50
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/584; Y; Y10; Y10S; Y10S507/00; Y10S507/935
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2164445A
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US2327017A
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US2345713A
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US2342106A
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US2341500A
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US2331594A
Cited
US2356205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-02 | 1952-05-03 | 1952-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-02 | 1956-05-03 | 1956-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-02 | 1960-05-03 | 1960-11-02 | $7700.00 | Window Closed / Lapsed |