US3859260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oligomers
Assignee: Uniroyal Chemical Co Inc
•
Filing: 1973-08-22
•
Granted: 1975-01-07
•
Expires: 1993-08-22
Abstract
Abstract The invention relates to a polymerization process employing a bisulfite salt as the initiator and the bisulfite terminated oligomers formed thereby. The oligomers and their salts are useful as conductive agents.
Inventors
- 👤 Leland E Dannals
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:52
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/40; C08F220/00; C08F220/02; C08F220/04; C08F220/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
7 words
A WATER SOLUBLE OLIGOMER HAVING THE FORMULA:
Claim 2
Dependent Claim
7 words
A WATER SOLUBLE OLIGOMER HAVING THE FORMULA:
Claim 3
Dependent Claim
20 words
The oligomer of claim 1 wherein the oligomer contains one kind of Y group and one kind of X group.
Claim 4
Dependent Claim
11 words
The oligomer of claim 2 wherein the Y group is -COOH.
Claim 5
Dependent Claim
13 words
The oligomer of claim 1 wherein R1, R2, R3 and R4 are hydrogen.
Claim 6
Dependent Claim
15 words
The oligomer of claim 1 wherein M is an alkali metal, ammonium of amine salt.
References Cited (Backward Citations)
US2883369A
Cited
US3128298A
Cited
US3498942A
Cited
US3498943A
Cited
US3646099A
Cited
US3792027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |