US3674753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of polymer-alkali metal mercaptides
Assignee: Phillips Petroleum Co
•
Filing: 1970-07-02
•
Granted: 1972-07-04
•
Expires: 1990-07-02
Abstract
Abstract Polymers having at least one terminal alkali metal mercaptide end group per molecule are converted to products having improved oxidative stability by reaction with metal halides of Group 4a of the Periodic Table.
Inventors
- 👤 Carl A Uraneck
- 👤 William J Trepka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:15
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/42; C08C; C08C19/00; C08C19/30; C08C19/42; C08C19/44
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
30 words
The method of claim 1 in which the reaction is conducted at a temperature within the range of from about 0* C. to about 200* C. in an inert diluent.
Claim 2
Dependent Claim
37 words
The method of claim 1 in which said polymer having at least one alkali metal mercaptide terminal group is prepared by the polymerization of at least one monomer, said polymerization being initiated with an organoalkali metal compound.
Claim 3
Dependent Claim
32 words
The method of claim 3 in which said halide is employed in an amount within the range of from about 1 to about 5 milliequivalents per milliequivalent of said organoalkali metal compound.
Claim 4
Dependent Claim
12 words
The method of claim 1 in which said halide is silicon tetrachloride.
Claim 5
Dependent Claim
15 words
The method of claim 1 in which said alkali metal mercaptide terminal group comprises lithium.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |