US3705101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Neutron-absorbing material and method of manufacture
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1968-03-27
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Granted: 1972-12-05
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Expires: 1988-03-27
Abstract
Abstract THE NEUTRON-ABSORBING MATERIAL ESSENTIALLY COMPRISES BETWEEN 32 AND 40% BY WEIGHT OF POLYETHYLENE, BETWEEN 17 AND 20% BY WEIGHT OF WATER, BETWEEN 37 AND 45% BY WEIGHT OF GYPSUM AND APPROXIMATELY 1% OF BORON. THE METHOD OF PREPARATION OF THE MATERIAL CONSISTS IN INCORPORATING IN THE DRY STATE THE BORON COMPOUND WITH THE GYPSUM IN SUITABLE PROPORTIONS, IN ADDING THE MIXTURE OF BORON COMPOUND AND GYPSUM TO THE MIXING WATER IN WHICH A RETARDER OF SET MAY HAVE BEEN DISSOLVED, IN HOMOGENIZING THE MIXTURE, IN INCORPORATING POLYETHYLENE GRANULES WITH THE MIXTURE, IN POURING THE RESULTING PASTE INTO A CONTAINER AND IN TAMPING THE POURED PASTE.
Inventors
- 👤 Paul Blum
- 👤 Jacques Lefrancois
- 👤 Louis Vinarnick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:50
CPC Classifications
G; G21; G21F; G21F1/00; G21F1/02; G21F1/04; G21F1/042; G21F1/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |