Patent US2991062A successfully refreshed from Google Patents.
US2991062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cement manufacture
Assignee: Texaco Development Corp
•
Filing: 1957-12-02
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Granted: 1961-07-04
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Expires: 1977-12-02
Abstract
No abstract record available.
Inventors
- 👤 Harry V Rees
- 👤 Peter L Paull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:26
CPC Classifications
B; B02; B02C; B02C21/00; B02C19/00; B02C19/0056; B02C19/06; B02C19/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735787A
Cited
US2026441A
Cited
US2270870A
Cited
US2580235A
Cited
US2543987A
Cited
US2821346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |