Patent US2694700A successfully refreshed from Google Patents.
US2694700A
Expired / Lapsed
US
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Process of suspension polymerization
Assignee: Individual
•
Filing: 1950-01-21
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Granted: 1954-11-16
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Expires: 1970-01-21
Abstract
No abstract record available.
Inventors
- 👤 Peter L Shanta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:33
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/18; Y; Y10; Y10S; Y10S526/00; Y10S526/909; Y10S526/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN A PROCESS FOR CONTINUOUS SUSPENSION POLYMERIZATION, THE STEPS WHICH COMPRISE CONTINUOUSLY ADDING A NORMALLY LIQUID, CATALYST-CONTAINING, POLYMERIZABLE, VINYL COMPOUND TO A LIQUID SUSPENSION MEDIUM IN WHICH SAID COMPOUND IS SUBSTANTIALLY INSOLUBLE, MECHANICALLY DISPERSING SAID COMPOUND AS GLOBULES IN SAID MEDIUM TO FORM A SUSPENSION, CIRCULATING SAID GLOBULES IN A SINGLE VESSEL OF SAID MEDIUM BY AGITATION UNTIL SAID GLOBULES CONSIST SUBSTANTIALLY WHOLLY OF POLYMER WHILE CONTINUOUSLY SUPPLYING AND WITHDRAWNING SUSPENSION MEDIUM TO AND FROM SAID VESSEL, WHILE MAINTAINING SAID SUSPENSION AT A TEMPERATURE FAVORABLE TO POLYMERIZATION OF SAID COMPOUND BY CONTROLLING THE TEMPERATURE OF THE SUSPENSION MEDIUM SUPPLIED TO SAID VESSEL, AND WHILE INTRODUCING BUBBLES OF AN INERT GAS INTO SAID VESSEL BELOW THE SURFACE OF SAID SUSPENSION, AND SEPARATING GLOBULES OF POLYMER WHICH SETTLE OUT OF SAID SUSPENSION.
Claim 2
Dependent Claim
130 words
IN A PROCESS FOR CONTINUOUS SUSPENSION POLYMERIZATION, THE STEPS WHICH COMPRISE CONTINUOUSLY ADDING A NORMALLY LIQUID, CATALYST-CONTAINING, POLYMERIZABLE, VINYL COMPOUND TO A LIQUID SUSPENSION MEDIUM IN WHICH SAID COMPOUND IS SUBSTANTIALLY INSOLUBLE, MECHANICALLY DISPERSING SAID COMPOUND AS GLOBULES IN SAID MEDIUM TO FORM A SUSPENSION, CIRCULATING SAID GLOBULES IN A SINGLE VESSEL OF SAID MEDIUM BY AGITATION UNTIL SAID GLOBULES CONSIST SUBSTANTIALLY WHOLLY OF POLYMER WHILE CONTINUOUSLY SUPPLYING AND WITHDRAWNING SUSPENSION MEDIUM TO AND FROM SAID VESSEL, WHILE MAINTAINING SAID SUSPENSION AT A TEMPERATURE FAVORABLE TO POLYMERIZATION OF SAID COMPOUND BY CONTROLLING THE TEMPERATURE OF THE SUSPENSION MEDIUM SUPPLIED TO SAID VESSEL, AND WHILE INTRODUCING BUBBLES OF AN INERT GAS INTO SAID VESSEL BELOW THE SURFACE OF SAID SUSPENSION, AND SEPARATING GLOBULES OF POLYMER WHICH SETTLE OUT OF SAID SUSPENSION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-15 | 1958-05-17 | 1958-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-15 | 1962-05-17 | 1962-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-15 | 1966-05-17 | 1966-11-16 | $7700.00 | Window Closed / Lapsed |