US3640824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paraffin inhibitor in crude oil with high-molecular weight highly branched polyethylene
Assignee: SOGC Inc
•
Filing: 1965-11-19
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Granted: 1972-02-08
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Expires: 1985-11-19
Abstract
Abstract A paraffin inhibitor for use in treating crude oil which contains as the essential ingredient in an amount effective to inhibit paraffin deposition, polyethylene having a molecular weight in excess of about 6,000 and a structure having at least 10 percent branching. The inhibitor may additionally contain naphthalene, microcrystalline wax having a melting point in excess of about 160* F. and/or asphaltenes.
Inventors
- 👤 Salim M Bucaram
- 👤 Lawrence V Collings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:27
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/52; C09K8/524; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/929; Y10S507/931
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
40 words
The crude oil composition of claim 1 which consists essentially of naphthalene and said polyethylene, about 5 to 90 percent by weight of the inhibitor being polyethylene and the polyethylene being present in an amount effective to inhibit paraffin deposition.
Claim 2
Dependent Claim
32 words
The crude oil composition of claim 2 which additionally contains from about 5 to 90 percent by weight of a microcrystalline wax having a melting point in excess of about 160* F.
Claim 3
Dependent Claim
38 words
The crude oil composition of claim 1, wherein said polyethylene has a molecular weight in excess of about 20,000, and a structure having in excess of about 25 weight percent of branched carbon atoms in the polymer chain.
Claim 4
Dependent Claim
76 words
A paraffin inhibitor for use in treating crude oil consisting essentially of naphthalene; polyethylene having a molecular weight in excess of 6,000, and a structure having at least 10 weight percent of branched carbon atoms in the polymer chain; a microcrystalline wax having a melting point in excess of about 160* F., and asphaltenes; each of such naphthalene, polyethylene, microcrystalline wax, and asphaltenes being present in the range of from 5 to 85 percent by weight.
Claim 5
Dependent Claim
26 words
The paraffin inhibitor of claim 5 wherein said molecular weight is in excess of about 20,000 and said branching is in excess of about 25 percent.
Claim 6
Dependent Claim
29 words
The paraffin inhibitor of claim 5, wherein said molecular weight is in excess of about 20,000, and said branching is in the range of about 40 to 50 percent.
Claim 7
Dependent Claim
20 words
The paraffin inhibitor of claim 5 wherein the naphthalene, polyethylene, microcrystalline wax and asphaltenes are present in approximately equal amounts.
References Cited (Backward Citations)
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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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |