US4360120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing compositions
Assignee: WR Grace and Co Conn
•
Filing: 1981-06-26
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Granted: 1982-11-23
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Expires: 2001-06-26
Abstract
Abstract Glass beads having a particle size of 1 to 200 microns are included as part or all of the filler in a sealing composition suitable for sealing container ends and which may be made by dispersing or dissolving solid styrene butadiene or other rubbery polymer and filler, and optionally also containing a tackifying resin, in a liquid medium.
Inventors
- 👤 David N. Samuel
- 👤 Kenneth M. Sinnott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:16
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; C08; C08K; C08K3/00; C08K3/40; C09K2200/00; C09K2200/02; C09K2200/0239; C09K2200/0243; C09K2200/0252; C09K2200/0256; C09K2200/06; C09K2200/0607; C09K2200/0615
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
47 words
A container having a closure sealed to it by a seal that includes a gasket formed of a composition comprising rubbery polymer in which is dispersed filler including an effective amount of crush resistent glass beads having a particle size of about 1 to about 200 microns.
Claim 2
Dependent Claim
47 words
A container having a closure sealed to it by a seal that includes a gasket formed of a composition comprising rubbery polymer in which is dispersed filler including an effective amount of crush resistent glass beads having a particle size of about 1 to about 200 microns.
Claim 3
Dependent Claim
75 words
A container according to claim 1 in which the glass beads have an average particle size of about 10 to about 75% microns and are present in the composition in an amount of about 5% to about 100% and in which the composition includes 0 to about 250% tackifier and filler additional to glass beads in an amount of 0 to about 150%, all percentages being by volume based on the volume of rubbery polymer.
Claim 4
Dependent Claim
100 words
A container according to claim 1 in which the glass beads have an average particle size of about 10 to about 50 microns and are present in the composition in an amount of about 5 to about 50% and in which the composition includes tackifier in an amount of about 15 to about 200% and includes filler in a total amount of about 20 to about 175%, all percentages being by volume based on the volume of rubbery polymer, and in which there are about 0.05 to about 2 parts by volume glass beads per part by volume other filler.
Claim 5
Dependent Claim
47 words
A container according to claim 1 in which the glass beads have an average particle size of about 20 to about 50 microns and are present in the composition in an amount of about 5 to about 30% by volume based on the volume of rubbery polymer.
Claim 6
Dependent Claim
25 words
A container according to claim 1 in which the rubber polymer has a Mooney viscosity (ML 1+4 100 ° C.) of from 20 to 200.
Claim 7
Dependent Claim
33 words
A container according to claim 1 in which the rubbery polymer is selected from styrene butadiene rubber, styrene butadiene block copolymers, polybutadiene, styrene acrylic copolymers, butadiene acrylonitrile copolymers, polyvinylidene chloride and butyl rubber.
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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) | 1985-11-22 | 1986-05-24 | 1986-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-22 | 1990-05-24 | 1990-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-22 | 1994-05-24 | 1994-11-23 | $7700.00 | Window Closed / Lapsed |