US2899326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water hardening mixtures
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
•
Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:30
CPC Classifications
C; C04; C04B; C04B14/00; C04B14/02; C04B14/30; C04B14/303
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A WATER HARDENING MIXTURE CONISSTING ESSENTIALLY OF A WATER HARDENING, CALCIUM CONTAINING CEMEMT AND CALCINED ALUMINA, THE ALUMINA BEING IN THE PROPORTIONS OF 2 TO 15 PERCENT BY WEIGHT OF THE CEMENT.
Claim 2
Dependent Claim
32 words
A WATER HARDENING MIXTURE CONISSTING ESSENTIALLY OF A WATER HARDENING, CALCIUM CONTAINING CEMEMT AND CALCINED ALUMINA, THE ALUMINA BEING IN THE PROPORTIONS OF 2 TO 15 PERCENT BY WEIGHT OF THE CEMENT.
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) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |