Patent US3188221A successfully refreshed from Google Patents.
US3188221A
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Method of retarding the setting time of cement
Assignee: Taiheiyo Cement Corp
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Filing: 1962-05-25
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Granted: 1965-06-08
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Expires: 1982-05-25
Abstract
No abstract record available.
Inventors
- 👤 Matsuda Osaku
- 👤 Toki Takashi
- 👤 Kudo Norihiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:12
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B22/00; C04B22/08; C04B22/12; C04B22/126; C04B28/04; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A METHOD OF RETARDING THE SETTING TIME OF A CEMENT WHEN SAID CEMENT IS ADMIXED WITH WATER, SAID CEMENT BEING SELECTED FROM THE GROUP CONSISTING OF PORTLAND CEMENT AND PORTLAND TYPE CEMENT WHICH CONTAINS BLAST FURNACE SLAG, SILICIOUS MATERIAL AND POZZOLANIC MATERIAL, WHICH COMPRISES ADDING TO SAID CEMENT ABOUT 0.01% TO ABOUT 1% BY WEIGHT BASED ON THE WEIGHT OF CEMENT OF A RETARDANT CONSISTING OF MAGNESIUM SILICOFLUORIDE
Claim 2
Independent Claim
68 words
A METHOD OF RETARDING THE SETTING TIME OF A CEMENT WHEN SAID CEMENT IS ADMIXED WITH WATER, SAID CEMENT BEING SELECTED FROM THE GROUP CONSISTING OF PORTLAND CEMENT AND PORTLAND TYPE CEMENT WHICH CONTAINS BLAST FURNACE SLAG, SILICIOUS MATERIAL AND POZZOLANIC MATERIAL, WHICH COMPRISES ADDING TO SAID CEMENT ABOUT 0.01% TO ABOUT 1% BY WEIGHT BASED ON THE WEIGHT OF CEMENT OF A RETARDANT CONSISTING OF MAGNESIUM SILICOFLUORIDE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |