Patent US4511689A successfully refreshed from Google Patents.
US4511689A
Expired / Lapsed
US
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Blends of hardened extract with copolymers of olefin/alkyl acrylate
Assignee: BP PLC
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Filing: 1982-12-03
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Granted: 1985-04-16
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Expires: 2002-12-03
Abstract
Abstract This invention relates to a blend of an olefin/alkyl acrylate copolymer and hardened extract which has a saturated hydrocarbon content of not more than 10% by weight and articles made therefrom, e.g. linings for reservoirs and for water proofing roofs. The new products are easier to manufacture since they resist gelation, do not suffer from problems of shrinkage and are appreciably cheaper.
Inventors
- 👤 Alan C. G. Aldred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:52
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0869; C08L23/26; C08L23/28; C08L23/286; C08L95/00; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1515; C08K5/16; C08K5/17; C08L2205/00; C08L2205/03; C08L23/0807; C08L23/0815; C08L23/32; C08L23/34
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
87 words
A blend of an olefin/alkyl acrylate copolymer and hardened extract, said hardened extract having a saturated hydrocarbon content of not more than 10% by weight and being obtained by blowing a gas containing free oxygen into a petroleum extract at elevated temperature, the petroleum extract having been obtained by the solvent extraction of a product of petroleum refining which product is a distillate petroleum fraction or a deasphalted petroleum residue, which product boils above 350° C. at atmospheric pressure and contains a major proportion of aromatic hydrocarbons.
Claim 2
Dependent Claim
87 words
A blend of an olefin/alkyl acrylate copolymer and hardened extract, said hardened extract having a saturated hydrocarbon content of not more than 10% by weight and being obtained by blowing a gas containing free oxygen into a petroleum extract at elevated temperature, the petroleum extract having been obtained by the solvent extraction of a product of petroleum refining which product is a distillate petroleum fraction or a deasphalted petroleum residue, which product boils above 350° C. at atmospheric pressure and contains a major proportion of aromatic hydrocarbons.
Claim 3
Dependent Claim
37 words
A blend according to claim 1 wherein the olefin in the copolymer is ethylene or propylene and the alkyl acrylate is selected from methyl acrylate, ethyl acrylate, propyl acrylate, pentyl acrylate, 2-ethyl hexyl acrylate and decyl acrylate.
Claim 4
Dependent Claim
16 words
A blend according to claim 2 wherein the copolymer is derived from ethylene and ethyl acrylate.
Claim 5
Dependent Claim
15 words
A blend according to claim 3 wherein the ethylene polymer is a low density polyethylene.
Claim 6
Dependent Claim
22 words
A blend according to claim 1 wherein the olefin/alkyl acrylate copolymer contains between 3 and 18% by weight of the alkyl acrylate.
Claim 7
Dependent Claim
27 words
A blend according to claim 1 wherein the relative weights of olefin/alkyl acrylate copolymer and hardened extract in the blend is in the range 4:1 to 1:10.
Claim 8
Dependent Claim
15 words
A blend according to claim 1 wherein the blend contains in addition a chlorinated polyethylene.
Claim 9
Dependent Claim
24 words
A blend according to claim 7 wherein the weight of chlorinated polyethylene relative to olefin/alkyl acrylate copolymer is in the range 1:9 to 4:1.
Claim 10
Dependent Claim
87 words
An article comprising an olefin/alkyl acrylate copolymer and hardened extract, said hardened extract having a saturated hydrocarbon content of not more than 10% by weight and being obtained by blowing a gas containing free oxygen into a petroleum extract at elevated temperature, the petroleum extract having been obtained by the solvent extraction of a product of petroleum refining which product is a distillate petroleum fraction or a deasphalted petroleum residue, which product boils above 350° C. at atmospheric pressure and contains a major proportion of aromatic hydrocarbons.
Claim 11
Dependent Claim
87 words
An article comprising an olefin/alkyl acrylate copolymer and hardened extract, said hardened extract having a saturated hydrocarbon content of not more than 10% by weight and being obtained by blowing a gas containing free oxygen into a petroleum extract at elevated temperature, the petroleum extract having been obtained by the solvent extraction of a product of petroleum refining which product is a distillate petroleum fraction or a deasphalted petroleum residue, which product boils above 350° C. at atmospheric pressure and contains a major proportion of aromatic hydrocarbons.
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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) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |