Patent US2945539A successfully refreshed from Google Patents.
US2945539A
Expired / Lapsed
US
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Cementing composition and method of use
Assignee: Dow Chemical Co
•
Filing: 1958-07-31
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Granted: 1960-07-19
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Expires: 1978-07-31
Abstract
No abstract record available.
Inventors
- 👤 Louis H Eilers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:45
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/24; C04B24/34; C04B28/00; C04B28/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2348484A
Cited
US2526674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |