US3884839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Neutron attenuating construction material
Assignee: Dow Chemical Co
•
Filing: 1971-04-16
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Granted: 1975-05-20
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Expires: 1991-04-16
Abstract
Abstract A structural body to absorb neutrons and a method of producing the body. Such method involves impregnating a porous ceramic body with selected hydrogen and/or boron containing compounds substantially chemically inert to the body.
Inventors
- 👤 Charles K Bon
- 👤 Robert J Moolenaar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:32
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/80; C04B41/81; C04B41/85; C04B20/00; C04B20/10; C04B20/1055; C04B28/00; C04B28/24; C04B28/26; C04B41/009; C04B41/45; C04B41/50; G; G21; G21F; G21F1/00; G21F1/02; G21F1/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
76 words
A BODY SUITABLE FOR BUILDING CONSTRUCTION COMPRISING AN EXPANDED CLAY POROUS BODY IMPREGNATED WITH AT LEAST FROM ABOUT 10 TO ABOUT 50 WEIGHT PERCENT OF AT LEAST ONE INORGANIC NEUTRON ABSORBER SELECTED FROM THE GROUP CONSISTING OF AN ALUM HAVING A MELTING TEMPERATURE WITHIN THE RANGE OF ABOUT 50*C TO ABOUT 400*C, BORIC ACID, HYDRATED AMMONIUM AND ALKALI METAL BORATES, AND HYDRATED SODIUM SILICATE, SAID IMPREGNATED BODY CHARACTERIZED BY LIGHT WEIGHT AND ABSORPTION OF NEUTRON FLOW.
Claim 2
Dependent Claim
76 words
A BODY SUITABLE FOR BUILDING CONSTRUCTION COMPRISING AN EXPANDED CLAY POROUS BODY IMPREGNATED WITH AT LEAST FROM ABOUT 10 TO ABOUT 50 WEIGHT PERCENT OF AT LEAST ONE INORGANIC NEUTRON ABSORBER SELECTED FROM THE GROUP CONSISTING OF AN ALUM HAVING A MELTING TEMPERATURE WITHIN THE RANGE OF ABOUT 50*C TO ABOUT 400*C, BORIC ACID, HYDRATED AMMONIUM AND ALKALI METAL BORATES, AND HYDRATED SODIUM SILICATE, SAID IMPREGNATED BODY CHARACTERIZED BY LIGHT WEIGHT AND ABSORPTION OF NEUTRON FLOW.
Claim 3
Dependent Claim
25 words
The body of claim 1 wherein the neutron absorber is selected from the group consisting of boric acid and hydrated ammonium and alkali metal borates.
Claim 4
Dependent Claim
17 words
The body of claim 1 wherein the porous body is substantially completely impregnated with the neutron absorber.
References Cited (Backward Citations)
US2796529A
Cited
US3002857A
Cited
US3049447A
Cited
US3453160A
Cited
US3649342A
Cited
US3511692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |