US3305613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hardening a cement mixture
Assignee: Monolith Portland Cement Co
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Filing: 1963-06-28
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Granted: 1967-02-21
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Expires: 1983-06-28
Abstract
No abstract record available.
Inventors
- 👤 Gerald M Spence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:04
CPC Classifications
B; B28; B28B; B28B11/00; B28B11/24; B28B11/245; B28B21/00; B28B21/42; B28B21/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN A PROCESS OF MANUFACTURING A PORTLAND CEMENT PRODUCT IN WHCIH A LAYER OF A PORTLAND CEMENT MIXTURE CONTAINING WATER IS LOCATED UPON A SUPPORTING SURFACE AND IS TRANSFERRED FROM SAID SUPPORTING SUFRACE TO A FORM HAVE A SHAPE CORRESPONDING TO THE SHAPE OF SAID PRODUCT, THE IMPROVEMENT WHICH COMPRISES: APPYLING CARBON DIOXIDE GAS TO SAID MIXTURE PRIOR TO THE HYDRATION OF THE CEMENT IN SAID MIXTURE AS SAID
Claim 2
Dependent Claim
69 words
IN A PROCESS OF MANUFACTURING A PORTLAND CEMENT PRODUCT IN WHCIH A LAYER OF A PORTLAND CEMENT MIXTURE CONTAINING WATER IS LOCATED UPON A SUPPORTING SURFACE AND IS TRANSFERRED FROM SAID SUPPORTING SUFRACE TO A FORM HAVE A SHAPE CORRESPONDING TO THE SHAPE OF SAID PRODUCT, THE IMPROVEMENT WHICH COMPRISES: APPYLING CARBON DIOXIDE GAS TO SAID MIXTURE PRIOR TO THE HYDRATION OF THE CEMENT IN SAID MIXTURE AS SAID
References Cited (Backward Citations)
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Cited
US2004703A
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US2177643A
Cited
US2671939A
Cited
US2914422A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |