Patent US2793958A successfully refreshed from Google Patents.
US2793958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of cement
Assignee: Sunoco Inc
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Filing: 1955-01-21
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Granted: 1957-05-28
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Expires: 1975-01-21
Abstract
No abstract record available.
Inventors
- 👤 Stanford J Hetzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:58
CPC Classifications
C; C04; C04B; C04B7/00; C04B7/36; C04B7/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
32% TO 23.06% SIO2 4.05% TO 7.59% AL2O3 1.45% TO 5.77% FE2O3 62.01% TO 66.93% CAO 0.68% TO 4.91% MGO
Claim 2
Dependent Claim
20 words
32% TO 23.06% SIO2 4.05% TO 7.59% AL2O3 1.45% TO 5.77% FE2O3 62.01% TO 66.93% CAO 0.68% TO 4.91% MGO
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-27 | 1960-11-26 | 1961-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-27 | 1964-11-26 | 1965-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-27 | 1968-11-26 | 1969-05-28 | $7700.00 | Window Closed / Lapsed |