US2793129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic cementitious mixtures
Assignee: Individual
•
Filing: 1953-09-04
•
Granted: 1957-05-21
•
Expires: 1973-09-04
Abstract
No abstract record available.
Inventors
- 👤 Klein Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:21
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/10; C04B24/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A CEMENTITIOUS MIXTURE CONSISTING ESSENTIALLY OF HYDRAULIC CEMENT AS THE CEMENTING INGREDIENT AND A SMALL AMOUNT OF THE END LIQUOR RESULTING FROM THE SEPARATION OF GLUTAMIC ACID FROM CONCENTRTED STEFFEN FILTRATE, 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
54 words
A CEMENTITIOUS MIXTURE CONSISTING ESSENTIALLY OF HYDRAULIC CEMENT AS THE CEMENTING INGREDIENT AND A SMALL AMOUNT OF THE END LIQUOR RESULTING FROM THE SEPARATION OF GLUTAMIC ACID FROM CONCENTRTED STEFFEN FILTRATE, 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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |