US4343864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sealing an item in a covering comprising a composition of a polyethylene and isobutylene copolymer
Assignee: Radiation Dynamics Inc
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Filing: 1981-08-20
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Granted: 1982-08-10
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Expires: 2001-08-20
Abstract
Abstract Cross-linkable polyethylene blended with a copolymer of isobutylene and a conjugated diene is capable of being cross-linked, bonded, stretched and recovered without a significant loss of strength characteristics or seal.
Inventors
- 👤 Anthony J. Berejka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:09
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; B; B29; B29C; B29C65/00; B29C65/02; B29C65/08; B29C66/00; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/70; B29C66/71; B29C66/73; B29C66/737; B29C66/7371; B29C66/7375; B29C66/73751; B29C66/73752; B29C66/739; B29C66/7394; B29C66/73941; C08L23/18; C08L23/20; C08L23/22; C08L23/26; B29C35/00; B29C35/02; B29C35/08; B29C35/0866; B29C2035/0877; B29C65/14; B29C65/66; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/73711; B29K; B29K2009/00; B29K2023/00; B29K2023/04; B29K2023/06; B29K2023/0608; B29K2023/0633; B29K2023/065; B29K2023/18; B29K2023/22; B29K2105/00; B29K2105/0005; B29K2105/0085; B29K2105/0088; B29K2105/24; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31938
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
49 words
Articles formed by heat sealing or ultrasonic welding sheets or films of a composition comprising a cross-linkable polyethylene and a copolymer of isobutylene and conjugated diene wherein a sufficient quantity of isobutylene copolymer to render the sheet or film heat sealable or sealable onto itself or other polyolefin compositions.
Claim 2
Dependent Claim
49 words
Articles formed by heat sealing or ultrasonic welding sheets or films of a composition comprising a cross-linkable polyethylene and a copolymer of isobutylene and conjugated diene wherein a sufficient quantity of isobutylene copolymer to render the sheet or film heat sealable or sealable onto itself or other polyolefin compositions.
Claim 3
Dependent Claim
13 words
A sheet or film according to claim 1 wherein said polyethylene is cross-linked.
Claim 4
Dependent Claim
16 words
A sheet according to claim 1 wherein a portion of said sheet is sealed to itself.
Claim 5
Dependent Claim
54 words
A manifold article suitable for use as a solar collecting panel formed by ultrasonic welding sheets of a composition comprising a cross-linkable polyethylene and a copolymer of isobutylene and conjugated diene wherein a sufficient quantity of isobutylene copolymer to render the sheet or film heat sealable or sealable onto itself or other polyolefin compositions.
Claim 6
Dependent Claim
54 words
A manifold article suitable for use as a solar collecting panel formed by ultrasonic welding sheets of a composition comprising a cross-linkable polyethylene and a copolymer of isobutylene and conjugated diene wherein a sufficient quantity of isobutylene copolymer to render the sheet or film heat sealable or sealable onto itself or other polyolefin compositions.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-09 | 1986-02-08 | 1986-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-09 | 1990-02-08 | 1990-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-09 | 1994-02-08 | 1994-08-10 | $7700.00 | Window Closed / Lapsed |