Patent US3821022A successfully refreshed from Google Patents.
US3821022A
Expired / Lapsed
US
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Intumescent coated crosslinked polyolefins
Assignee: Phillips Petroleum Co
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Filing: 1972-05-30
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Granted: 1974-06-28
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Expires: 1992-05-30
Abstract
Abstract Articles of manufacture are described comprising crosslinked polyolefins having intumescent coatings thereon. Said articles are self supporting and substantially retain the shape of the original articles even after exposure to pryolysis and/or combustion temperatures of up to 2,500* F.
Inventors
- 👤 R Rees
- 👤 G Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:55
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/05; C08J2323/00; C08J2323/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31859; Y10T428/3187; Y10T428/31873; Y10T428/31938
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
58 words
An article according to claim 1 wherein the cross-linked polyolefin is characterized by a density within the range of from about 0.930 to about 0.940, and wherein the cross-linked polyethylene substrate contiguous to said coating retains substantially the original substrate form after said coating has been subjected to direct pyrolysis or combustion at temperatures up to 2,500* F.
Claim 2
Dependent Claim
41 words
An article according to claim 2 wherein said cross-linked polyolefin is prepared by contacting an uncross-linked polyolefin characterized by a density within the range of from about 0.940 to 0.970 with an acetylenic diperoxy compound under suitable cross-linking temperatures and pressures.
Claim 3
Dependent Claim
31 words
An article according to claim 3 wherein said acetylenic diperoxy compound has a molecular weight within the range of from about 230 to about 550 and is represented by the formula:
Claim 4
Dependent Claim
31 words
An article according to claim 4 wherein said article retains substantially the original article form after said coating has been subjected to pyrolysis or combustion temperatures up to 2, 500* F.
Claim 5
Dependent Claim
25 words
An article according to claim 5 wherein said article contains a cavity and the entire wall of said cavity is covered with said intumescent coating.
Claim 6
Dependent Claim
31 words
An article according to claim 6 wherein said intumescent coating comprises caRbonaceous materials, dehydrating agents, blowing agents, and said coatings react to flame or heat at temperatures of about 300* F.
Claim 7
Dependent Claim
15 words
An article according to claim 7 wherein said article is a waste paper basket container.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |