Patent US3251701A successfully refreshed from Google Patents.
US3251701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansive and shrinkage-compensated cements
Assignee: Chemically Prestressed Concrete Corp
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Filing: 1964-09-24
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Granted: 1966-05-17
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Expires: 1984-09-24
Abstract
No abstract record available.
Inventors
- 👤 Klein Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:05
CPC Classifications
C; C04; C04B; C04B7/00; C04B7/32; C04B7/323; Y; Y02; Y02P; Y02P40/00; Y02P40/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A CEMENT COMPOSITION WHICH IN CLINKER FORM CONTAINS AND WHEREIN IN THE FORM OF GROUND CEMENT EACH PARTICLE CONTAINS (A) AT LEAST ONE SILICATE OF THE TYPE PRESENT IN PORTLAND CEMENT AND HAVING THE PROPERTIES OF AN HYDRAULIC CEMENT AND (B) A STABLE CALCIUM ALUMINO SULFATE IN THE FORM OF A TERNARY COMPOUND
Claim 2
Dependent Claim
53 words
A CEMENT COMPOSITION WHICH IN CLINKER FORM CONTAINS AND WHEREIN IN THE FORM OF GROUND CEMENT EACH PARTICLE CONTAINS (A) AT LEAST ONE SILICATE OF THE TYPE PRESENT IN PORTLAND CEMENT AND HAVING THE PROPERTIES OF AN HYDRAULIC CEMENT AND (B) A STABLE CALCIUM ALUMINO SULFATE IN THE FORM OF A TERNARY COMPOUND
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |