Patent US3207705A successfully refreshed from Google Patents.
US3207705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation shielding composition comprising carbon and lead dispersed in cement
Assignee: Chemtree Corp
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Filing: 1962-04-19
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Granted: 1965-09-21
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Expires: 1982-04-19
Abstract
No abstract record available.
Inventors
- 👤 William C Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:58
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/30; G; G21; G21F; G21F1/00; G21F1/02; G21F1/04; G21F1/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A RADIATION SHIELDING COMPOSITION CONSISTING OF FROM 25-50% COMMINUTED CARBON BY GROSS VOLUME, FROM 2550% COMMINUTED LEAD BY GROSS VOLUME, AND CEMENT TO FORM A SOLID STRUCTURE, THE CARBON AND LEAD BEING DISPERSED EVENLY THROUGHOUT THE CEMENT.
Claim 2
Dependent Claim
37 words
A RADIATION SHIELDING COMPOSITION CONSISTING OF FROM 25-50% COMMINUTED CARBON BY GROSS VOLUME, FROM 2550% COMMINUTED LEAD BY GROSS VOLUME, AND CEMENT TO FORM A SOLID STRUCTURE, THE CARBON AND LEAD BEING DISPERSED EVENLY THROUGHOUT 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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |