US4128185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Container closure
Assignee: WR Grace and Co
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Filing: 1977-11-07
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Granted: 1978-12-05
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Expires: 1997-11-07
Abstract
Abstract A plastisol composition containing as the resin component a copolymer of a normal alpha -olefin and maleic anhydride (1:1 mole ratio) having the structure <IMAGE> WHEREIN B is a member of the group consisting of <IMAGE> and the hydrolysis product thereof, <IMAGE> R is H or CxH2x+1, x is 1 to 16 and n is 2-300, and a plasticizer for said resin component. The plastisol when fluxed can be used as a closure gasket for containers.
Inventors
- 👤 Walter R. Wszolek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:09
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; B; B65; B65D; B65D41/00; B65D41/02; B65D41/10; B65D41/12; C08; C08K; C08K3/00; C08K3/10; C08K5/00; C08K5/04; C08K5/10; C08L; C08L23/00; C08L23/02; C08L23/025; C08L35/00; C08L63/00; C08L67/00; C09K2200/00; C09K2200/06; C09K2200/0615; C09K2200/0645; C09K2200/0647; Y; Y10; Y10S; Y10S215/00; Y10S215/04; Y10S526/00; Y10S526/909; Y10T; Y10T428/00; Y10T428/21; Y10T428/214; Y10T428/29; Y10T428/2982; Y10T428/31504; Y10T428/31855
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
126 words
A container closure comprising a cap having deposited therein a resinous mass functioning as a gasket to seal the container when the closure is in sealing relationship with the container, said resinous mass comprising a fluxed plastisol of a composition comprising (a) a copolymer resin of a normal α-olefin and maleic anhydride (1:1 mole ratio) having a particle size in the range of from about 0.1 to about 1500 microns and having the structure ##STR7## wherein B is a member of the group consisting of ##STR8## R is H or C x H 2x+1 , x is 1 to 16 and n is 2-300, and (b) about 65 to 600 parts by weight of a polyester plasticizer per 100 parts by weight of the copolymer resin.
Claim 2
Dependent Claim
126 words
A container closure comprising a cap having deposited therein a resinous mass functioning as a gasket to seal the container when the closure is in sealing relationship with the container, said resinous mass comprising a fluxed plastisol of a composition comprising (a) a copolymer resin of a normal α-olefin and maleic anhydride (1:1 mole ratio) having a particle size in the range of from about 0.1 to about 1500 microns and having the structure ##STR7## wherein B is a member of the group consisting of ##STR8## R is H or C x H 2x+1 , x is 1 to 16 and n is 2-300, and (b) about 65 to 600 parts by weight of a polyester plasticizer per 100 parts by weight of the copolymer resin.
Claim 3
Dependent Claim
27 words
The container closure of claim 1 including an ionizable metallic compound wherein the metal is selected from Group I, II, III or VIII of the Periodic Table.
References Cited (Backward Citations)
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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) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |