US3207828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for isolating chloroprene polymers from aqueous dispersions thereof
Assignee: EIDP Inc
•
Filing: 1962-07-10
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Granted: 1965-09-21
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Expires: 1982-07-10
Abstract
No abstract record available.
Inventors
- 👤 Robert E A Petersen
- 👤 Frey William Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:37
CPC Classifications
C; C08; C08C; C08C1/00; C08C1/14; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/1011
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A PROCESS WHICH COMPRISES ROTATING IN OPPOSITE DIRECTIONS TWO CYLINDRICAL MEMBERS WHICH ARE HORIZONTALLY SPACED TO FORM A NARROW OPENING AT THE TOP THEREBETWEEEN AND HAVING ROUGHENED CYLINDRICAL SURFACES, THE DIRECTIONS OF SAID ROTATION BEING TO MOVE FROM ABOVE SAID NIP TO BELOW AND WITH THE SURFACE SPEED OF ONE OF SAID MEMBERS BEING GREATER THAN BUT WITHIN 150% OF THE SURFACE SPEED OF THE OTHER OF SAID MEMBERS, APPLYING AT LEAST SOME COAGULATING SOLUTION TO SAID CYLINDRICAL MEMBERS TO CAUSE WETTING THEREOF, APPLYING CHLOROPRENE POLYMER LATEX AND ADDITIONAL COAGULATING SOLUTION TO AT LEAST ONE OF SAID WET CYLINDRICAL MEMBERS IN AN AMOUNT SUFFICIENT TO FORM A BACK-LOG OF COAGULUM ABOVE SAID NIP, WITH SAID BACK-LOG BEING LATERALLY CONFINED AT THE ENDS OF SAID NARROW OPENING, PASSING THE MIXTURE RESULTING FROM THE TWO PREVIOUS APPLYING STEPS THROUGH SAID NIP, WITH SAID BACKLOG BEING OF SUCH SIZE AS TO PERMIT SAID RESULTING MIX-
Claim 2
Dependent Claim
152 words
A PROCESS WHICH COMPRISES ROTATING IN OPPOSITE DIRECTIONS TWO CYLINDRICAL MEMBERS WHICH ARE HORIZONTALLY SPACED TO FORM A NARROW OPENING AT THE TOP THEREBETWEEEN AND HAVING ROUGHENED CYLINDRICAL SURFACES, THE DIRECTIONS OF SAID ROTATION BEING TO MOVE FROM ABOVE SAID NIP TO BELOW AND WITH THE SURFACE SPEED OF ONE OF SAID MEMBERS BEING GREATER THAN BUT WITHIN 150% OF THE SURFACE SPEED OF THE OTHER OF SAID MEMBERS, APPLYING AT LEAST SOME COAGULATING SOLUTION TO SAID CYLINDRICAL MEMBERS TO CAUSE WETTING THEREOF, APPLYING CHLOROPRENE POLYMER LATEX AND ADDITIONAL COAGULATING SOLUTION TO AT LEAST ONE OF SAID WET CYLINDRICAL MEMBERS IN AN AMOUNT SUFFICIENT TO FORM A BACK-LOG OF COAGULUM ABOVE SAID NIP, WITH SAID BACK-LOG BEING LATERALLY CONFINED AT THE ENDS OF SAID NARROW OPENING, PASSING THE MIXTURE RESULTING FROM THE TWO PREVIOUS APPLYING STEPS THROUGH SAID NIP, WITH SAID BACKLOG BEING OF SUCH SIZE AS TO PERMIT SAID RESULTING MIX-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |