US2900265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic cementitious mixtures
Assignee: Individual
•
Filing: 1957-05-20
•
Granted: 1959-08-18
•
Expires: 1977-05-20
Abstract
No abstract record available.
Inventors
- 👤 Klein Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:51
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A CEMENTITIOUS MIXTURE CONSISTING ESSENTIALLY OF HYDRAULIC CEMENT AS THE CEMENTING INGREDIENT AND A SMALL AMOUNT OF THE REACTION PRODUCT RESULTING FROM THE HYDROLYSIS OF CONCENTRATED STEFFEN FILTRATE AND CONTAINING GLUTAMIC ACID, SAID AMOUNT, RECKONED ON A DRY BASIS, BEING BETWEEN ABOUT 0.02 AND 0.8 PERCENT BY WEIGHT OF THE CEMENT CONTENT OF SAID MIXTURE.
Claim 2
Dependent Claim
55 words
A CEMENTITIOUS MIXTURE CONSISTING ESSENTIALLY OF HYDRAULIC CEMENT AS THE CEMENTING INGREDIENT AND A SMALL AMOUNT OF THE REACTION PRODUCT RESULTING FROM THE HYDROLYSIS OF CONCENTRATED STEFFEN FILTRATE AND CONTAINING GLUTAMIC ACID, SAID AMOUNT, RECKONED ON A DRY BASIS, BEING BETWEEN ABOUT 0.02 AND 0.8 PERCENT BY WEIGHT OF THE CEMENT CONTENT OF SAID MIXTURE.
References Cited (Backward Citations)
GB413322A
Cited
US2793129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |