US3821348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering nitrile polymer solids from latex
Assignee: Standard Oil Co
•
Filing: 1972-02-25
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Granted: 1974-06-28
•
Expires: 1992-02-25
Abstract
Abstract Nitrile polymer solids, such as an acrylonitrile-methyl acrylate copolymer prepared in emulsion in the presence of a diene rubber, are recovered from the latex by mechanical shearing of the latex to form a paste followed by shaping and contacting the shaped paste with a hot water medium.
Inventors
- 👤 P Planz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:58
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/14; C08F6/22; Y; Y10; Y10S; Y10S528/00; Y10S528/931; Y10S528/934; Y10S528/936
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
21 words
The process of claim 1 wherein the unsaturated nitrile is a member selected from the group consisting of acrylonitrile and methacrylonitrile.
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) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |