Patent US2233973A successfully refreshed from Google Patents.
US2233973A
Expired / Lapsed
US
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Slow setting cement
Assignee: Stanolind Oil and Gas Co
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Filing: 1939-06-22
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Granted: 1941-03-04
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Expires: 1959-06-22
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:42
CPC Classifications
C; C04; C04B; C04B22/00; C04B22/08; C04B22/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-03-03 | 1944-09-02 | 1945-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-03-03 | 1948-09-02 | 1949-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-03-03 | 1952-09-02 | 1953-03-04 | $7700.00 | Window Closed / Lapsed |