US4437013A — Neutron and gamma radiation shielding material, s…

Claim 1

Independent Claim 32 words

A material for use as a neutron and gamma radiation shield consisting of about 95 to 97 percent by weight SiO 2 and about 5 to 3 percent by weight sodium silicate.

Claim 2

Dependent Claim 32 words

A material for use as a neutron and gamma radiation shield consisting of about 95 to 97 percent by weight SiO 2 and about 5 to 3 percent by weight sodium silicate.

Claim 3

Dependent Claim 16 words

The material of claim 1 wherein the sodium silicate has a specific gravity of about 40°Be'.

Claim 4

Dependent Claim 52 words

A radiation shielding structure capacity of preventing passage of neutron and gamma radiation comprising a plurality of discrete radiation shielding elements and a radiation shielding material disposed between said elements and joining said elements one to the other, said radiation shielding material consisting of a mixture of SiO 2 and sodium silicate.

Claim 5

Dependent Claim 52 words

A radiation shielding structure capacity of preventing passage of neutron and gamma radiation comprising a plurality of discrete radiation shielding elements and a radiation shielding material disposed between said elements and joining said elements one to the other, said radiation shielding material consisting of a mixture of SiO 2 and sodium silicate.

Claim 6

Dependent Claim 31 words

The radiation shield structure of claim 3 wherein said radiation shielding material comprises about 95 to 97 percent by weight SiO 2 and 5 to 3 percent by weight sodium silicate.

Claim 7

Independent Claim 50 words

A method of making a radiation shield structure capable of preventing passage of neutron or gamma radiation comprising joining a plurality of discrete radiation shielding elements one to the other by disposing a radiation shielding material consisting of SiO 2 and sodium silicate between said elements and curing said material.

Claim 8

Independent Claim 50 words

A method of making a radiation shield structure capable of preventing passage of neutron or gamma radiation comprising joining a plurality of discrete radiation shielding elements one to the other by disposing a radiation shielding material consisting of SiO 2 and sodium silicate between said elements and curing said material.

Claim 9

Dependent Claim 29 words

The method of claim 5 wherein the radiation shielding material consists of 95 to 97 percent by weight SiO 2 and 5 to 3 percent by weight sodium silicate.

Claim 10

Independent Claim 74 words

A method of making a radiation shielding structure capable of preventing passage of neutron or gamma radiationcomnprising: a. providing a plurality of discrete radiation shield elements, b. providing a radiation shielding material consisting of SiO 2 and sodium silicate, c. disposing said radiation shielding material between said discrete radiation shield elements to join said elements one to the other to form a substantial continuous radiation shield structure, and d. curing said radiation shielding material.

Claim 11

Independent Claim 74 words

A method of making a radiation shielding structure capable of preventing passage of neutron or gamma radiationcomnprising: a. providing a plurality of discrete radiation shield elements, b. providing a radiation shielding material consisting of SiO 2 and sodium silicate, c. disposing said radiation shielding material between said discrete radiation shield elements to join said elements one to the other to form a substantial continuous radiation shield structure, and d. curing said radiation shielding material.

Claim 12

Dependent Claim 20 words

The method of claim 7 wherein step (d) is performed by introducing CO 2 gas into said radiation shielding material.

Claim 13

Dependent Claim 31 words

The method of claim 8 wherein tubing is placed into said radiation shield material, and said CO 2 gas is introduced into said radiation shielding material through a small diameter tubing.

Claim 14

Dependent Claim 30 words

The method of claim 9 wherein said radiation shield material consists of about 95 to 97% by weight SiO 2 and about 5 to 3 percent by weight sodium silicate.

Claim 15

Dependent Claim 26 words

The method of claim 10 where said CO 2 gas is introduced into said radiation shield material at a pressure of about 20 to 40 psi.

Claim 16

Dependent Claim 45 words

A material capable of capturing thermalized neutrons for use as a neutron and gamma radiation shield consisting of about 94.5 to 95.5 percent by weight SiO 2 , about 5 to 3 percent by weight sodium silicate and 0.5 to 1.5 percent by weight boron.

Claim 17

Dependent Claim 45 words

A material capable of capturing thermalized neutrons for use as a neutron and gamma radiation shield consisting of about 94.5 to 95.5 percent by weight SiO 2 , about 5 to 3 percent by weight sodium silicate and 0.5 to 1.5 percent by weight boron.

Claim 18

Dependent Claim 45 words

The method of claim 5 wherein the radiation shielding material is produced by (1) recycling a previously cured radiation shielding material, (2) grinding said recycled material, and (3) adding sodium silicate binder in an amount sufficient to replace said binder lost during said previous curing.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1987-03-13	1987-09-12	1988-03-13	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1991-03-13	1991-09-12	1992-03-13	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1995-03-13	1995-09-12	1996-03-13	$7700.00	Window Closed / Lapsed

Neutron and gamma radiation shielding material, structure, and process of making structure

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