Patent US2531403A successfully refreshed from Google Patents.
US2531403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for coagulating a latex of a sulfur dioxide resin
Assignee: Phillips Petroleum Co
•
Filing: 1949-07-08
•
Granted: 1950-11-28
•
Expires: 1969-07-08
Abstract
No abstract record available.
Inventors
- 👤 Willie W Crouch
- 👤 Lawrence D Jurrens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:19
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/20; C08G75/205; C08G75/22; Y; Y10; Y10S; Y10S528/00; Y10S528/931; Y10S528/934; Y10S528/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
AN IMPROVED PROCESS FOR PRODUCING A GRANULAR HETEROPOLYMERIC RESIN FROM 1-BUTENE AND SULFUR DIOXIDE, WHICH COMPRISES COPOLYMERIZING SAME IN THE PRESENCE OF AN EMULSIFYING AGENT HAVING THE FORMULA RCOOCH2CH2OSO3NA WHERE R IS A C12 TO C18 ALIPHATIC HYDROCARBON RADICAL, VENTING THE BULK OF THE UNREACTED SULFUR DIOXIDE FROM A RESULTING LATEX SO THAT SAID LATEX HAS A PH BELOW 3, AGING SAID LATEX AT A TEMPERATURE BETWEEN 70 AND 160*F. FOR 1 TO 25 HOURS, WHEREBY A COAGULATION OF SAID LATEX TAKES PLACE, AND RECOVERING A RESULTING GRANULAR HETEROPOLYMERIC RESIN FROM SAID COAGULATED LATEX.
Claim 2
Dependent Claim
94 words
AN IMPROVED PROCESS FOR PRODUCING A GRANULAR HETEROPOLYMERIC RESIN FROM 1-BUTENE AND SULFUR DIOXIDE, WHICH COMPRISES COPOLYMERIZING SAME IN THE PRESENCE OF AN EMULSIFYING AGENT HAVING THE FORMULA RCOOCH2CH2OSO3NA WHERE R IS A C12 TO C18 ALIPHATIC HYDROCARBON RADICAL, VENTING THE BULK OF THE UNREACTED SULFUR DIOXIDE FROM A RESULTING LATEX SO THAT SAID LATEX HAS A PH BELOW 3, AGING SAID LATEX AT A TEMPERATURE BETWEEN 70 AND 160*F. FOR 1 TO 25 HOURS, WHEREBY A COAGULATION OF SAID LATEX TAKES PLACE, AND RECOVERING A RESULTING GRANULAR HETEROPOLYMERIC RESIN FROM SAID COAGULATED LATEX.
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) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |