US4339246A
Expired / Lapsed
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Mixed fuel composition
Assignee: Lion Corp
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Filing: 1981-06-26
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Granted: 1982-07-13
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Expires: 2001-06-26
Abstract
Abstract A mixed fuel composition comprises (a) a fuel oil, (b) a coal powder having an [H]/[C] ratio according to the coalification band method in the range of 0.4-0.75 and an [O]/[C] ratio in the range of 0.09-0.18 and (c) a partially amidated copolymer obtained by reacting a copolymer of a polymerizable, unsaturated hydrocarbon and maleic anhydride with an aliphatic amine of 2-36 carbon-atoms or a salt thereof as a stabilizer.
Inventors
- 👤 Masaaki Yamamura
- 👤 Taizo Igarashi
- 👤 Toshiyuki Ukigai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:42
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/32; C10L1/322
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
72 words
A mixed fuel composition which comprises (a) a fuel oil, (b) a coal powder having an [H]/[C] ratio according to the coalification band method in the range of 0.4-0.75 and an [O]/[C] ratio in the range of 0.09-0.18 and (c) a partially amidated copolymer obtained by reacting a copolymer of a polymerizable, unsaturated hydrocarbon and maleic anhydride with an aliphatic amine of 2-36 carbon atoms or a salt thereof as a stabilizer.
Claim 2
Dependent Claim
72 words
A mixed fuel composition which comprises (a) a fuel oil, (b) a coal powder having an [H]/[C] ratio according to the coalification band method in the range of 0.4-0.75 and an [O]/[C] ratio in the range of 0.09-0.18 and (c) a partially amidated copolymer obtained by reacting a copolymer of a polymerizable, unsaturated hydrocarbon and maleic anhydride with an aliphatic amine of 2-36 carbon atoms or a salt thereof as a stabilizer.
Claim 3
Dependent Claim
43 words
A mixed fuel composition as claimed in claim 1 wherein the polymerizable unsaturated hydrocarbon is an aliphatic olefin of 4-24 carbon atoms having a terminal double bond, styrene per se or styrene having an alkyl group of 1-6 carbon atoms as a substituent.
Claim 4
Dependent Claim
38 words
A mixed fuel composition as claimed in claim 1 wherein the partially amidated copolymer is obtained by using 0.6-1.2 moles of said aliphatic amine per mole of the acid anhydride corresponding to maleic anhydride moiety in the copolymer.
Claim 5
Dependent Claim
25 words
A mixed fuel composition as claimed in claim 1, wherein the partially amidated copolymer or salt thereof has a molecular weight of 1,000 to 50,000.
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) | 1985-07-12 | 1986-01-11 | 1986-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-12 | 1990-01-11 | 1990-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-12 | 1994-01-11 | 1994-07-13 | $7700.00 | Window Closed / Lapsed |