Patent US3656985A successfully refreshed from Google Patents.
US3656985A
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Portland cement composition having an accelerated set
Assignee: Progil SARL
•
Filing: 1970-12-01
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Granted: 1972-04-18
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Expires: 1990-12-01
Abstract
Abstract A composition for quickening the setting of Portland cement constituted by 0.5 - 5 parts of alkali aluminate and 0.05 - 2 parts of hydroxylated organic acid.
Inventors
- 👤 Bernard Bonnel
- 👤 Christian Hovasse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:06
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; C04B22/00; C04B22/0093; C04B2103/00; C04B2103/10; C04B2103/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
24 words
Composition according to claim 1 in which said aluminate has a ratio MeO2/Al2O3 comprised between 1 and 4, wherein Me is an alkali metal.
Claim 2
Dependent Claim
12 words
Composition according to claim 2 wherein said ratio is 1 to 2.
Claim 3
Dependent Claim
25 words
Composition according to claim 1 in which hydroxylated organic acid is selected from the group consisting of tartaric, citric, gluconic, malic, lactic and salicylic acids.
References Cited (Backward Citations)
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Cited
US2819171A
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US2880102A
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US3053674A
Cited
US3433657A
Cited
US3351478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |