US2469353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cementing earth bores
Assignee: Pure Oil Co
•
Filing: 1944-10-11
•
Granted: 1949-05-10
•
Expires: 1964-10-11
Abstract
No abstract record available.
Inventors
- 👤 Irwin W Alcorn
- 👤 Donald C Bond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:32
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B24/00; C04B24/12; C04B24/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190715808A
Cited
US1635500A
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US2079518A
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US2188767A
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US2234642A
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US2215812A
Cited
US2224120A
Cited
US2290956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-09 | 1952-11-08 | 1953-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-09 | 1956-11-08 | 1957-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-09 | 1960-11-08 | 1961-05-10 | $7700.00 | Window Closed / Lapsed |