US2716641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of polymerizing olefinically unsaturated compounds
Assignee: Shell Development Co
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Filing: 1951-10-09
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Granted: 1955-08-30
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Expires: 1971-10-09
Abstract
No abstract record available.
Inventors
- 👤 Van Der Franciscus J F Plas
- 👤 Van Christiaan P Dijk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:23
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/24; B01J19/2415; B01J19/2435; C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; C08F2/00; C08F2/12; C08F2/16; C08F2/22; C08F2/24; C08F36/00; C08F36/02; C08F36/04; C10; C10M; C10M5/00; C10M7/00; C10M2201/00; C10M2201/06; C10M2201/062; C10M2201/063; C10M2201/065; C10M2201/08; C10M2201/082; C10M2201/083; C10M2201/086; C10M2201/10; C10M2201/102; C10M2201/103; C10M2201/105; C10M2201/14; C10M2203/00; C10M2203/10; C10M2205/00; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/023; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/125; C10M2207/129; C10M2207/22; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/04; C10M2209/06; C10M2209/062; C10M2209/08; C10M2209/10; C10M2209/103; C10M2209/105; C10M2209/107; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/08; C10M2215/082; C10M2215/12; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/02; C10M2217/04; C10M2217/046; C10M2217/06; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2030/00; C10N2030/12; C10N2040/00; C10N2040/02; C10N2050/00; C10N2050/10; C10N2070/00; Y; Y10; Y10S; Y10S526/00; Y10S526/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
192 words
IN A PROCESS FOR PRODUCING POLYMER OF A CINYLIDENE COMPOUND WHICH IS AT LEAST ONLY PARTIALLY MISCIBLE WITH WATER WHEREIN DROPS OF MONOMER OF THE VINYLIDEN COMPOUND ARE CONTINUOUSLY INTRODUCED INTO SUBMERGED CONTACT WITH A VERTICAL COLUMN OF A LIQUID AQUEOUS MEDIUM AT POLYMER-PRODUCING TEMPERATURE FOR SAID VINYLIDENE COMPOUND, SAID AQUEOUS MEDIUM CONTAINING A WATER-SOLUBLE PEROXY POLYMERIZATION CATALYST AND AN EMULSIFYING AGENT FOR FORMED POLYMER OF SAID VINYLIDENE COMPOUND; AND WHEREIN SAID DROPS ARE CONDUCTED THROUGH SAID COLUMN OF AQUEOUS MEDIUM WHILE MAINTAINING THE RATE OF INTRODUCTION OF SAID MONOMER DROPS SUCH THAT A MAJORITY OF THE INTRODUCED MONOMER PASSES CLEAR THROUGH THE AQUEOUS MEDIUM IN MONOMERIC FORM, THE MOVEMENT OF THE DROPS THROUGH SAID AQUEOUS MEDIUM BEING EFFECTED PRIMARILY BY DIFFERENCE IN DENSITY OF SAID DROPS AND THE MEDIUM, WHICH MEDIUM IS FREE OF MECHANICALLY INDUCED AGITATION; AND FUTHER WHEREIN THE DROPS OF THE VINYLIDENE COMPOUND WHICH HAVE PASSED THROUGH THE AQUEOUS MEDIUM ARE COLLECTED INTO AN INTERGRAL MONOMER PHASE WHICH IS MAINTAINED IN CONTACT WITH THE AQUEOUS MEDIUM; THE IMPROVEMENT WHICH COMPRISES ALSO INTRODUCING CONTINUOUSLY INTO SAID AQUEOUS MEDIUM A SUBSTANTIAL AMOUNT OF AN AQUEOUS EMULSION OF SAID VINYLIDENE COMPOUND.
Claim 2
Dependent Claim
192 words
IN A PROCESS FOR PRODUCING POLYMER OF A CINYLIDENE COMPOUND WHICH IS AT LEAST ONLY PARTIALLY MISCIBLE WITH WATER WHEREIN DROPS OF MONOMER OF THE VINYLIDEN COMPOUND ARE CONTINUOUSLY INTRODUCED INTO SUBMERGED CONTACT WITH A VERTICAL COLUMN OF A LIQUID AQUEOUS MEDIUM AT POLYMER-PRODUCING TEMPERATURE FOR SAID VINYLIDENE COMPOUND, SAID AQUEOUS MEDIUM CONTAINING A WATER-SOLUBLE PEROXY POLYMERIZATION CATALYST AND AN EMULSIFYING AGENT FOR FORMED POLYMER OF SAID VINYLIDENE COMPOUND; AND WHEREIN SAID DROPS ARE CONDUCTED THROUGH SAID COLUMN OF AQUEOUS MEDIUM WHILE MAINTAINING THE RATE OF INTRODUCTION OF SAID MONOMER DROPS SUCH THAT A MAJORITY OF THE INTRODUCED MONOMER PASSES CLEAR THROUGH THE AQUEOUS MEDIUM IN MONOMERIC FORM, THE MOVEMENT OF THE DROPS THROUGH SAID AQUEOUS MEDIUM BEING EFFECTED PRIMARILY BY DIFFERENCE IN DENSITY OF SAID DROPS AND THE MEDIUM, WHICH MEDIUM IS FREE OF MECHANICALLY INDUCED AGITATION; AND FUTHER WHEREIN THE DROPS OF THE VINYLIDENE COMPOUND WHICH HAVE PASSED THROUGH THE AQUEOUS MEDIUM ARE COLLECTED INTO AN INTERGRAL MONOMER PHASE WHICH IS MAINTAINED IN CONTACT WITH THE AQUEOUS MEDIUM; THE IMPROVEMENT WHICH COMPRISES ALSO INTRODUCING CONTINUOUSLY INTO SAID AQUEOUS MEDIUM A SUBSTANTIAL AMOUNT OF AN AQUEOUS EMULSION OF SAID VINYLIDENE COMPOUND.
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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) | 1958-08-29 | 1959-02-28 | 1959-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-29 | 1963-02-28 | 1963-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-29 | 1967-02-28 | 1967-08-30 | $7700.00 | Window Closed / Lapsed |