US2880076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing polyvinyl chloride
Assignee: Detrex Corp
•
Filing: 1955-06-30
•
Granted: 1959-03-31
•
Expires: 1975-06-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles E Kircher
- 👤 Robert J Jones
- 👤 Robert F Kriz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:18
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/1862; C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00054; B01J2219/00056; B01J2219/00058; B01J2219/00063; B01J2219/00065; B01J2219/00074; B01J2219/00087; B01J2219/00094; B01J2219/00103; B01J2219/00162; B01J2219/00164; B01J2219/00189
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
AN APPARATUS FOR THE CONTINUOUS PRODUCTION OF POLYVINYL CHLORIDE FROM VINYL CHLORIDE AND A SUSPENDING AGENT COMPRISING STORAGE MEANS FOR SAID VINYL CHLORIDE AND SUSPENDING AGENT, A PRIMARY REACTOR, MEANS FOR TRANSFERRING SAID VINLY CHLORIDE CONTAINING CATALYST AND SUSPENDING AGENT TO SAID PRIMARY REACTOR, AN EXTERNAL FLUID CIRCUIT INCLUDING A MIXING PUMP CONNECTED TO WITHDRAW THE REACTION MATERIAL FROM SAID PRIMARY REACTOR AND TO RETURN SAID REACTION MATERIAL TO SAID PRIMARY REACTOR, CONTROL MEANS FOR CONTROLLING THE EXTENT OF AGITATION IN THE PUMP TO CONTINUOUSLY FORM REACTION MIXTURE COMPRISING LARGE NUMBER OF EXTREMELY UNIFORM DROPLETS OF THE MONOMER, MEANS FOR SUBJECTING SAID DROPLETS WITHIN REACTION CHAMBER TO ONLY MODERATE AGITATION WHEREBY TO MINIMIZE THE PROBLEMS OF DEPOSITION OF POLYVINYL CHLORIDE ON REACTION EQUIPMENT, OF FOAMING, AND OF MAINTAINING A VAPOR TIGHT SEAL ON THE REACTOR, A SECONDARY REACTOR, CONNECTING MEANS EXTENDING FROM PRIMARY TO THE SECONDARY REACTOR, AND MEANS FOR CONTINUOUSLY WITHDRAWING THE PRODUCT FROM SAID SECONDARY REACTOR.
Claim 2
Independent Claim
158 words
AN APPARATUS FOR THE CONTINUOUS PRODUCTION OF POLYVINYL CHLORIDE FROM VINYL CHLORIDE AND A SUSPENDING AGENT COMPRISING STORAGE MEANS FOR SAID VINYL CHLORIDE AND SUSPENDING AGENT, A PRIMARY REACTOR, MEANS FOR TRANSFERRING SAID VINLY CHLORIDE CONTAINING CATALYST AND SUSPENDING AGENT TO SAID PRIMARY REACTOR, AN EXTERNAL FLUID CIRCUIT INCLUDING A MIXING PUMP CONNECTED TO WITHDRAW THE REACTION MATERIAL FROM SAID PRIMARY REACTOR AND TO RETURN SAID REACTION MATERIAL TO SAID PRIMARY REACTOR, CONTROL MEANS FOR CONTROLLING THE EXTENT OF AGITATION IN THE PUMP TO CONTINUOUSLY FORM REACTION MIXTURE COMPRISING LARGE NUMBER OF EXTREMELY UNIFORM DROPLETS OF THE MONOMER, MEANS FOR SUBJECTING SAID DROPLETS WITHIN REACTION CHAMBER TO ONLY MODERATE AGITATION WHEREBY TO MINIMIZE THE PROBLEMS OF DEPOSITION OF POLYVINYL CHLORIDE ON REACTION EQUIPMENT, OF FOAMING, AND OF MAINTAINING A VAPOR TIGHT SEAL ON THE REACTOR, A SECONDARY REACTOR, CONNECTING MEANS EXTENDING FROM PRIMARY TO THE SECONDARY REACTOR, AND MEANS FOR CONTINUOUSLY WITHDRAWING THE PRODUCT FROM SAID SECONDARY REACTOR.
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) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |