US4563416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state track detector composed of copolymer of alkylene glycol bisallyl carbonate and minor amount of higher alkyl acrylate or methacrylate
Assignee: TOKUYAMA SODA A CORP OF JAPAN KK
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Filing: 1984-09-28
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Granted: 1986-01-07
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Expires: 2004-09-28
Abstract
Abstract A solid state track detector composed of a crosslinked copolymer, said copolymer consisting essentially of (A) units derived from an alkylene glycol bisallyl carbonate represented by the general formula <IMAGE> (I) wherein R1 represents an alkylene group having 2 to 6 carbon atoms, and n is an integer of from 1 to 6, and (B) units derived from an alkyl acrylate or methacrylate represented by the general formula <IMAGE> (II) wherein R2 represents a hydrogen atom or a methyl group and R3 represents an unsubstituted or substituted alkyl group having 6 to 20 carbon atoms, the proportion of said units derived from the alkyl acrylate or methacrylate of formula (II) being 0.5 to 3 mole % based on the crosslinked copolymer.
Inventors
- 👤 Kazuo Shikata
- 👤 Yoshinori Mizumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:45
CPC Classifications
G; G01; G01T; G01T5/00; G01T5/10; C; C08; C08F; C08F218/00; C08F218/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
121 words
A solid state track detector composed of a crosslinked copolymer, said copolymer consisting essentially of (A) units derived from an alkylene glycol bisallyl carbonate represented by the general formula ##STR5## wherein R 1 represents an alkylene group having 2 to 6 carbon atoms, and n is an integer of from 1 to 6, and (B) units derived from an alkyl acrylate or methacrylate represented by the general formula ##STR6## wherein R 2 represents a hydrogen atom or a methyl group and R 3 represents an unsubstituted or substituted alkyl group having 6 to 20 carbon atoms, the proportion of said units derived from the alkyl acrylate or methacrylate of formula (II) being 0.5 to 3 mole% based on the crosslinked copolymer.
Claim 2
Dependent Claim
121 words
A solid state track detector composed of a crosslinked copolymer, said copolymer consisting essentially of (A) units derived from an alkylene glycol bisallyl carbonate represented by the general formula ##STR5## wherein R 1 represents an alkylene group having 2 to 6 carbon atoms, and n is an integer of from 1 to 6, and (B) units derived from an alkyl acrylate or methacrylate represented by the general formula ##STR6## wherein R 2 represents a hydrogen atom or a methyl group and R 3 represents an unsubstituted or substituted alkyl group having 6 to 20 carbon atoms, the proportion of said units derived from the alkyl acrylate or methacrylate of formula (II) being 0.5 to 3 mole% based on the crosslinked copolymer.
Claim 3
Dependent Claim
25 words
The solid state track detector of claim 1 wherein R 1 in general formula (I) is an alkylene group having 2 to 4 carbon atoms.
Claim 4
Dependent Claim
18 words
The solid state track detector of claim 1 wherein n in general formula (I) is 1 or 2.
Claim 5
Dependent Claim
49 words
The solid state track detector of claim 1 wherein the alkylene glycol bisallyl carbonate in general formula (I) is selected from the group consisting of ethylene glycol bisallyl carbonate, 1,2-propylene glycol bisallyl carbonate, 1,3-propylene glycol bisallyl carbonate, diethylene glycol bisallyl carbonate, dipropylene glycol bisallyl carbonate and mixtures of these.
Claim 6
Dependent Claim
28 words
The solid state track detector of claim 1 wherein R 3 in general formula (II) is an unsubstituted or substituted alkyl group having 8 to 18 carbon atoms.
Claim 7
Dependent Claim
37 words
The solid state track detector of claim 5 wherein the substituent on the substituted alkyl group is selected from the class consisting of halogen atoms, alkoxy groups having 1 to 4 carbon atoms and a phenoxy group.
Claim 8
Dependent Claim
39 words
The solid state track detector of claim 1 or 5 wherein the units (B) are derived from said alkyl acrylate and wherein the alkyl acrylate of general formula (II) is hexyl acrylate, 2-ethylhexyl acrylate, n-dodecyl acrylate or stearyl acrylate.
Claim 9
Dependent Claim
38 words
The solid state track detector of claim 1 or 5 wherein the units (B) are derived from alkyl methacrylate and wherein the alkyl methacrylate of general formula (II) is hexyl methacrylate, 2-ethylhexyl methacrylate, n-dodecyl methacrylate or stearyl methacrylate.
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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) | 1989-01-06 | 1989-07-08 | 1990-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-06 | 1993-07-08 | 1994-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-06 | 1997-07-08 | 1998-01-07 | $7700.00 | Window Closed / Lapsed |