US3075925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation shielding composition
Assignee: Individual
•
Filing: 1960-12-21
•
Granted: 1963-01-29
•
Expires: 1980-12-21
Abstract
No abstract record available.
Inventors
- 👤 Harold L Dunegan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:49
CPC Classifications
G; G21; G21F; G21F1/00; G21F1/02; G21F1/10; G21F1/103; G21F1/106
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
118 words
AS A COMPOSITION OF MATTER, A GAMMA RADIATION SHIELDING MATERIAL CONSISTING ESSENTIALLY OF 55% TO 70% BY WEIGHT OF A PLASTIC RESIN SELECTED FROM THE GROUP CONSISTING OF POLYURETHANE, POLYETHYLENE, AND EPOXY, 15% TO 40% BY WEIGHT OF A METAL POWDER SELECTED FROM THE GROUP CONSISTING OF LEAD AND TUNGSTEN, 1% TO 15% BY WEIGHT OF A RESIN PLASTICIZER SELECTED FROM THE GROUP CONSISTING OF TRICHLOROETHYL PHOSPHATE, TRICRESYL PHOSPHATE, CASTON OIL, DIBUTYL PHTHALATE, AND DIOCTYL PHATHALATE, 1% TO 5% BY WEIGHT OF A POLYMERIZATION CATALYST SELECTED FROM THE GROUP CONSISTING OF BENZOYL PEROXIDE, LAUROYL PEROXIDE, AND METHYLENE-BIS (ORTHO-CHLORO-ANILINE), AND SUFFICIIENT INCLUDED AIR SUCH THAT THE COMPOSITION PRESSESSES A DENSITY OF FROM 1.3 TO 1.5 GRAMS PER CUBIC CENTIMETER.
Claim 2
Dependent Claim
118 words
AS A COMPOSITION OF MATTER, A GAMMA RADIATION SHIELDING MATERIAL CONSISTING ESSENTIALLY OF 55% TO 70% BY WEIGHT OF A PLASTIC RESIN SELECTED FROM THE GROUP CONSISTING OF POLYURETHANE, POLYETHYLENE, AND EPOXY, 15% TO 40% BY WEIGHT OF A METAL POWDER SELECTED FROM THE GROUP CONSISTING OF LEAD AND TUNGSTEN, 1% TO 15% BY WEIGHT OF A RESIN PLASTICIZER SELECTED FROM THE GROUP CONSISTING OF TRICHLOROETHYL PHOSPHATE, TRICRESYL PHOSPHATE, CASTON OIL, DIBUTYL PHTHALATE, AND DIOCTYL PHATHALATE, 1% TO 5% BY WEIGHT OF A POLYMERIZATION CATALYST SELECTED FROM THE GROUP CONSISTING OF BENZOYL PEROXIDE, LAUROYL PEROXIDE, AND METHYLENE-BIS (ORTHO-CHLORO-ANILINE), AND SUFFICIIENT INCLUDED AIR SUCH THAT THE COMPOSITION PRESSESSES A DENSITY OF FROM 1.3 TO 1.5 GRAMS PER CUBIC CENTIMETER.
Claim 3
Dependent Claim
47 words
IN A PROCESS FOR PRODUCING A RADIATION SHIELDING MATERIAL, THE STEPS COMPRISING ADDING TUNGSTEN POWDER TO A MICTURE OF POLYURETHANE RESIN, PLASTICIZER, AND CATALYST, STIRRING SAID TUNGSTEN POWDER-PLASTIC MIXTURE VIGOROUSLY TO INCORPORATE AIR THEREIN, CURING SAID MIXTURE AT ELEVATED TEMPERATURE, AND FINALLY RECOVERING SAID CURED METAL-PLASTIC MIXTURE.
Claim 4
Dependent Claim
47 words
IN A PROCESS FOR PRODUCING A RADIATION SHIELDING MATERIAL, THE STEPS COMPRISING ADDING TUNGSTEN POWDER TO A MICTURE OF POLYURETHANE RESIN, PLASTICIZER, AND CATALYST, STIRRING SAID TUNGSTEN POWDER-PLASTIC MIXTURE VIGOROUSLY TO INCORPORATE AIR THEREIN, CURING SAID MIXTURE AT ELEVATED TEMPERATURE, AND FINALLY RECOVERING SAID CURED METAL-PLASTIC MIXTURE.
References Cited (Backward Citations)
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Cited
US2256483A
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US2858451A
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US2845660A
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Cited
US2961415A
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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) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |