Patent US4363714A successfully refreshed from Google Patents.
US4363714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
O-Alkylated/O-acylated coal liquids
Assignee: EXXXXON RESEARCH AND ENGINEERING Co A CORP OF
•
Filing: 1980-12-15
•
Granted: 1982-12-14
•
Expires: 2000-12-15
Abstract
Abstract Coal liquids are disclosed wherein the hydrogen of substantially all of the hydroxyl groups of the coal liquids have been replaced with C1 to C20 alkyl or acyl groups.
Inventors
- 👤 Ronald Liotta
- 👤 Martin L. Gorbaty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:01
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/006; C10G1/002
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
31 words
A coal liquid in which the hydrogen of substantially all of the hydroxyl groups of the coal liquid have been replaced with C 1 to C 20 alkyl or acyl groups.
Claim 2
Dependent Claim
31 words
A coal liquid in which the hydrogen of substantially all of the hydroxyl groups of the coal liquid have been replaced with C 1 to C 20 alkyl or acyl groups.
Claim 3
Dependent Claim
21 words
The coal liquid of claim 1 wherein the hydrogens are replaced with C 1 to C 4 alkyl or acyl groups.
Claim 4
Dependent Claim
19 words
The coal liquid of claim 2 wherein the hydrogens are replaced with C 1 to C 4 alkyl groups.
Claim 5
Dependent Claim
13 words
The coal liquid of claim 3 wherein the alkyl groups are methyl groups.
References Cited (Backward Citations)
US2378762A
Cited
US3359197A
Cited
US3376212A
Cited
US3992432A
Cited
US3617513A
Cited
DE2634419A1
Cited
US4092235A
Cited
BE851191A
Cited
US4089772A
Cited
US4059410A
Cited
US4072475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-13 | 1986-06-14 | 1986-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-13 | 1990-06-14 | 1990-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-13 | 1994-06-14 | 1994-12-14 | $7700.00 | Window Closed / Lapsed |