Patent US4617025A successfully refreshed from Google Patents.
US4617025A
Expired / Lapsed
US
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Ester-containing halopolyalkylenes
Assignee: Baker Petrolite LLC
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Filing: 1985-04-22
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Granted: 1986-10-14
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Expires: 2005-04-22
Abstract
Abstract This invention relates to polyalkylenes which contain both halogen and ester groups, to the preparation thereof, and to the use thereof as pour depressants for fuel oils. This invention also relates to polyalkylene esters.
Inventors
- 👤 Michael I. Naiman
- 👤 John A. Schield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:39
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/20; C10L1/206; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A fuel oil containing an effective pour point depressing amount of ester-containing halopolyalkylene characterized by internal olefinic unsaturation, by being essentially free of cross-linking, by having a branch index of from about 2 to about 20 and wherein the percent of halogen replaced with ester groups can vary from about 1 to 100.
Claim 2
Dependent Claim
53 words
A fuel oil containing an effective pour point depressing amount of ester-containing halopolyalkylene characterized by internal olefinic unsaturation, by being essentially free of cross-linking, by having a branch index of from about 2 to about 20 and wherein the percent of halogen replaced with ester groups can vary from about 1 to 100.
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) | 1989-10-13 | 1990-04-14 | 1990-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-13 | 1994-04-14 | 1994-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-13 | 1998-04-14 | 1998-10-14 | $7700.00 | Window Closed / Lapsed |