US2878875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cement
Assignee: ExxonMobil Oil Corp
•
Filing: 1954-06-30
•
Granted: 1959-03-24
•
Expires: 1974-06-30
Abstract
No abstract record available.
Inventors
- 👤 Irving R Dunlap
- 👤 Freeman D Patchen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:38
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B24/00; C04B24/24; C04B24/36; C04B40/00; C09; C09K; C09K8/00; C09K8/42; C09K8/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1772999A
Cited
US2071263A
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US2279262A
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US2285302A
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US2390225A
Cited
US2585336A
Cited
US2684720A
Cited
US2798003A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |