US3883488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-Vinyl-(9-dicyanomethylene) fluorene and derivatives thereof
Assignee: Xerox Corp
•
Filing: 1973-10-31
•
Granted: 1975-05-13
•
Expires: 1993-10-31
Abstract
Abstract Disclosed is a composition of matter characterized by the structural formula: WHEREIN R1 is hydrogen or methyl and R2, R3 and R4 are hydrogen, halogen or aliphatic groups containing 1 to 4 carbon atoms. Also disclosed are vinyl polymers of the above material.
Inventors
- 👤 James M Pearson
- 👤 John F Yanus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:18
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; C; C07; C07C; C07C1/00; C07C1/32; C07C1/34; C07C49/00; C07C49/76; C07C49/794; C07C49/798; C08; C08F; C08F12/00; C08F12/02; C08F12/32; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/06; C07C2603/10; C07C2603/12; C07C2603/18
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
9 words
A COMPOSITION OF MATTER CHARACTERIZED BY THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
9 words
A COMPOSITION OF MATTER CHARACTERIZED BY THE STRUCTURAL FORMULA:
Claim 3
Dependent Claim
9 words
The composition of claim 1 wherein R1 is hydrogen.
Claim 4
Dependent Claim
12 words
The composition of claim 2 wherein R2, R3 and R4 are hydrogen.
Claim 5
Dependent Claim
15 words
The composition of claim 1 wherein R2, R3 and R4 are bromine, chlorine or fluorine.
Claim 6
Dependent Claim
17 words
The composition of claim 1 wherein R2, R3 and R4 are independently alkyl, substituted alkyl, or alkoxy.
Claim 7
Independent Claim
13 words
A method of preparing a composition of matter characterized by the structural formula:
Claim 8
Independent Claim
13 words
A method of preparing a composition of matter characterized by the structural formula:
Claim 9
Dependent Claim
12 words
The method of claim 6 wherein R2, R3 and R4 are H.
Claim 10
Dependent Claim
9 words
The method of claim 7 wherein R1 is H.
Claim 11
Dependent Claim
10 words
The method of claim 8 wherein the solvent is methanol.
Claim 12
Dependent Claim
8 words
A homopolymeric composition characterized by the structural formula:
Claim 13
Dependent Claim
8 words
A homopolymeric composition characterized by the structural formula:
Claim 14
Dependent Claim
19 words
The polymeric composition of claim 10 wherein n is a number within the range of from 10 to 500.
Claim 15
Dependent Claim
13 words
The polymeric composition of claim 10 wherein R2, R3 and R4 are H.
Claim 16
Dependent Claim
10 words
The polymeric composition of claim 12 wherein R1 is H.
References Cited (Backward Citations)
US3226388A
Cited
US3637798A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |