Patent US3306961A successfully refreshed from Google Patents.
US3306961A
Expired / Lapsed
US
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Hardening cement mixtures
Assignee: Monolith Portland Cement Co
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Filing: 1965-06-14
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Granted: 1967-02-28
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Expires: 1985-06-14
Abstract
No abstract record available.
Inventors
- 👤 Gerald M Spence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:44
CPC Classifications
C; C04; C04B; C04B40/00; C04B40/02; C04B40/0231; B; B28; B28B; B28B11/00; B28B11/24; B28B11/245; B28B21/00; B28B21/42; B28B21/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN A PROCESS OF MANUFACTURING A PORTLAND CEMENT PRODUCT IN WHICH A LAYER OF A PORTLAND CEMENT MIXTURE CONTAINING WATER IS LOCATED UPON A SUPPORTING SURFACE AND IS TRANSFERRED FROM SAID SUPPORTING SURFACE TO A FORM HAVING A SHAPE CORRESPONDING TO THE SHAPE OF SAID PRODUCT, THE IMPROVEMENT WHICH COMPRISES: APPLYING HOT GASEOUS PRODUCTS RESULTING FROM COMBUSTION OF CARBON-CONTAINING FUEL TO SAID MIXTURE PRIOR TO THE HYDRATION OF THE CEMENT IN SAID MIXTURE AS SAID MIXTURE IS BEING HANDLED SO AS TO BE LOCATED UPON SAID FORM.
Claim 2
Dependent Claim
87 words
IN A PROCESS OF MANUFACTURING A PORTLAND CEMENT PRODUCT IN WHICH A LAYER OF A PORTLAND CEMENT MIXTURE CONTAINING WATER IS LOCATED UPON A SUPPORTING SURFACE AND IS TRANSFERRED FROM SAID SUPPORTING SURFACE TO A FORM HAVING A SHAPE CORRESPONDING TO THE SHAPE OF SAID PRODUCT, THE IMPROVEMENT WHICH COMPRISES: APPLYING HOT GASEOUS PRODUCTS RESULTING FROM COMBUSTION OF CARBON-CONTAINING FUEL TO SAID MIXTURE PRIOR TO THE HYDRATION OF THE CEMENT IN SAID MIXTURE AS SAID MIXTURE IS BEING HANDLED SO AS TO BE LOCATED UPON SAID FORM.
References Cited (Backward Citations)
US2177643A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |