US2762769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for continuous production of polyvinyl chloride
Assignee: Individual
•
Filing: 1951-01-26
•
Granted: 1956-09-11
•
Expires: 1971-01-26
Abstract
No abstract record available.
Inventors
- 👤 Arthur F Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:33
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
THE CONTINUOUS PROCESS OF PRODUCING POLYVINYL CHLORIDE FROM VINYL CHLORIDE MONOMER WHICH COMPRISES THE STEPS OF CAUSING BOILING OF A BODY OF CATALYZED MONOMER TO CAUSE THE PRODUCTION IN THE MONOMER OF A RELATIVELY SMALL PROPORTION OF POLYMER AND TO CAUSE THE MONOMER TO EXIST SUMULTANEOUSLY IN BOTH LIQUID PHASE AND VAPOR PHASE, CONTINUOUSLY CONDENSING A PORTION OF THE VAPOR PHASE MONOMER AND REFLUXING IT TO THE LIQUID PHASE MONOMER, CONTINUOUSLY WITHDRAWING A QUANTITY OF THE HEATED MIXTURE OF MONOMER AND POLYMER, PARTIALLY SEPARATING THE WITHDRAWN MIXTURE INTO A MONOMER PORTION AND A MIXED MONOMER AND POLYMER PORTION, CONTINUOUSLY RETURNING THE SEPARATED MONOMER PORTION TO THE BOILING BODY OF MONOMER, FURTHER SEPARATING THE MIXED MONOMER AND POLYMER PORTION INTO A MONOMER COMPONENT AND A POLYMER COMPONENT, AND CONTINUOUSLY RETURNING THE MONOMER COMPONENT TO THE BOILING BODY OF MONOMER.
Claim 2
Dependent Claim
138 words
THE CONTINUOUS PROCESS OF PRODUCING POLYVINYL CHLORIDE FROM VINYL CHLORIDE MONOMER WHICH COMPRISES THE STEPS OF CAUSING BOILING OF A BODY OF CATALYZED MONOMER TO CAUSE THE PRODUCTION IN THE MONOMER OF A RELATIVELY SMALL PROPORTION OF POLYMER AND TO CAUSE THE MONOMER TO EXIST SUMULTANEOUSLY IN BOTH LIQUID PHASE AND VAPOR PHASE, CONTINUOUSLY CONDENSING A PORTION OF THE VAPOR PHASE MONOMER AND REFLUXING IT TO THE LIQUID PHASE MONOMER, CONTINUOUSLY WITHDRAWING A QUANTITY OF THE HEATED MIXTURE OF MONOMER AND POLYMER, PARTIALLY SEPARATING THE WITHDRAWN MIXTURE INTO A MONOMER PORTION AND A MIXED MONOMER AND POLYMER PORTION, CONTINUOUSLY RETURNING THE SEPARATED MONOMER PORTION TO THE BOILING BODY OF MONOMER, FURTHER SEPARATING THE MIXED MONOMER AND POLYMER PORTION INTO A MONOMER COMPONENT AND A POLYMER COMPONENT, AND CONTINUOUSLY RETURNING THE MONOMER COMPONENT TO THE BOILING BODY OF MONOMER.
References Cited (Backward Citations)
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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) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |