US3656985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portland cement composition having an accelerated set
Assignee: Progil SARL
•
Filing: 1970-12-01
•
Granted: 1972-04-18
•
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 01:06
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)
US2174051A
Cited
US2819171A
Cited
US2880102A
Cited
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 |