Patent US3173884A successfully refreshed from Google Patents.
US3173884A
Expired / Lapsed
US
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Concrete comprising galena ore aggregate, calcium aluminum hydraulic binder and standard aggregates
Assignee: Individual
•
Filing: 1962-07-13
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Granted: 1965-03-16
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Expires: 1982-07-13
Abstract
No abstract record available.
Inventors
- 👤 David A Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:50
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/06; C04B14/00; C04B14/02; C04B14/36; G; G21; G21F; G21F1/00; G21F1/02; G21F1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
EXTRA HIGH DENSITY CONCRETE FOR RADIATION SHIELDING HAVING HIGH STRUCTURAL STRENGTH, COMPRISING GALENA ORE AGGREGATE IN COMBINATION WITH CALCIUM ALUMINATE HYDRAULIC BINDER CEMETN, AND STANDARD AGGREGATES.
Claim 2
Dependent Claim
26 words
EXTRA HIGH DENSITY CONCRETE FOR RADIATION SHIELDING HAVING HIGH STRUCTURAL STRENGTH, COMPRISING GALENA ORE AGGREGATE IN COMBINATION WITH CALCIUM ALUMINATE HYDRAULIC BINDER CEMETN, AND STANDARD AGGREGATES.
References Cited (Backward Citations)
US2726339A
Cited
US2887392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |