US4368828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing compositions
Assignee: WR Grace and Co Conn
•
Filing: 1981-06-26
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Granted: 1983-01-18
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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 is made by dispersing a filler in a latex of a styrene butadiene or other rubbery polymer, optionally also containing a tackifying resin.
Inventors
- 👤 David N. Samuel
- 👤 Kenneth M. Sinnott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:37
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: 2
Claim 1
Independent Claim
53 words
A container having a closure sealed to it by a seal that includes a gasket that has been formed from a composition comprising a latex of a rubbery polymer and in which has been dispersed a filler including crush resistant glass beads having a particle size of about 1 to about 200 microns.
Claim 2
Dependent Claim
53 words
A container having a closure sealed to it by a seal that includes a gasket that has been formed from a composition comprising a latex of a rubbery polymer and in which has been dispersed a filler including crush resistant glass beads having a particle size of about 1 to about 200 microns.
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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) | 1986-01-17 | 1986-07-19 | 1987-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-17 | 1990-07-19 | 1991-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-17 | 1994-07-19 | 1995-01-18 | $7700.00 | Window Closed / Lapsed |