US3950271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nuclear shields
Assignee: Honeywell International Inc
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Filing: 1974-04-26
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Granted: 1976-04-13
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Expires: 1994-04-26
Abstract
Abstract Melt-processable nuclear shielding compositions are prepared from chloro-fluoro substituted ethylene polymers, particularly PCTFE and E-CTFE, containing 1-75% by weight of a gadolinium compound.
Inventors
- 👤 Robert C. Linares
- 👤 Louis F. Nienart
- 👤 George A. Toelcke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:22
CPC Classifications
G; G21; G21F; G21F1/00; G21F1/02; G21F1/10; G21F1/103; G21F1/106; C; C08; C08K; C08K3/00; C08K3/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
36 words
A melt processable composition having a shielding effect against neutron radiation comprising a chloro-fluoro substituted ethylene polymer having distrubuted therethrough, and intimately admixed therewith, from about 1 to about 75% by weight of a gadolinium compound.
Claim 2
Dependent Claim
36 words
A melt processable composition having a shielding effect against neutron radiation comprising a chloro-fluoro substituted ethylene polymer having distrubuted therethrough, and intimately admixed therewith, from about 1 to about 75% by weight of a gadolinium compound.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein the polymer is ethylene chlorotrifluoroethylene copolymer.
Claim 4
Dependent Claim
10 words
The composition of claim 1 wherein the polymer is polychlorotrifluoroethylene.
Claim 5
Dependent Claim
12 words
The composition of claim 1 wherein the gadolinium compound is gadolinium oxide.
Claim 6
Dependent Claim
26 words
The composition of claim 1 wherein the gadolinium compound is present in amounts of from about 7.5 to about 60% by weight of the total composition.
Claim 7
Dependent Claim
18 words
The composition of claim 1 comprising ethylenechlorotrifluoroethylene containing from about 7.5 to about 25 weight percent gadolinium oxide.
Claim 8
Dependent Claim
18 words
The composition of claim 1 comprising polychlorotrifluoroethylene containing from about 25 to about 60 weight percent gadolinium oxide.
Claim 9
Dependent Claim
19 words
The composition of claim 1 wherein the gadolinium compounds possess particle sizes within the range of 0.1 to 70μ.
Claim 10
Dependent Claim
39 words
A shaped article of manufacture having a shielding effect against neutron radiation comprising a melt-processed chlorofluoro substituted ethylene polymer having distrubuted therethrough and intimately admixed therewith from about 1 to about 75% by weight of a compound of gadolinium.
Claim 11
Dependent Claim
39 words
A shaped article of manufacture having a shielding effect against neutron radiation comprising a melt-processed chlorofluoro substituted ethylene polymer having distrubuted therethrough and intimately admixed therewith from about 1 to about 75% by weight of a compound of gadolinium.
Claim 12
Dependent Claim
12 words
The article of claim 9 in the form of a Raschig ring.
Claim 13
Dependent Claim
11 words
The article of claim 9 in the form of a pipe.
Claim 14
Dependent Claim
14 words
The article of claim 9 in the form of a blow-molded or roto-molded vessel.
Claim 15
Dependent Claim
11 words
The article of claim 9 in the form of a filament.
References Cited (Backward Citations)
US3000802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |