Patent US2993020A successfully refreshed from Google Patents.
US2993020A
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US
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Process for enlarging the average particle size and concentrating synthetic rubber latex and products obtained thereby
Assignee: DSM Copolymer Inc
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Filing: 1957-08-23
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Granted: 1961-07-18
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Expires: 1977-08-23
Abstract
No abstract record available.
Inventors
- 👤 Paul G Carpenter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:14
CPC Classifications
C; C08; C08C; C08C1/00; C08C1/02; C08C1/065; Y; Y10; Y10S; Y10S159/00; Y10S159/05; Y10S159/10; Y10S260/00; Y10S260/22; Y10S528/00; Y10S528/931; Y10S528/934; Y10S528/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN A PROCESS FOR ENLARGING THE AVERAGE PARTICLE SIZE OF SYNTHETIC RUBBER LATEX WHEREIN THE LATEX IS AGGLOMERATED BY STEPS INCLUDING FREEZING AND THAWING IN WHICH PREFLOC IS FORMED, THE IMPROVEMENT WHICH COMPRISES REDUCING PREFLOC FORMATION BY FREEZING AND THAWING A SYNTHETIC RUBBER LATEX BLEND COMPRISING FROZEN AND THAWED AGGLOMERATED SYNTHETIC RUBBER LATEX AND SYNTHETIC RUBBER LATEX HAVING A SMALLER AVERAGE PARTICLE SIZE THAN THE FROZEN AND THAWED AGGLOMERATED LATEX, EACH 100 PARTS OF THE LATEX BLEND CONTAINING 5-85 PATS OF THE FROZEN AND THAWED AGGLOMERATED LATEX AND 95-15 PARTS OF THE LATEX HAVING A SMALLER AVERAGE PARTICLE SIZE WHEN CALCULATED BY WEIGHT ON A DRY SOLIDS BASIS, THE SYNTHETIC RUBBER LATEX BEING SELECTED FROM LATICES OF THE GROUP CONSISTING OF LATICES OF RUBBERY HOMOPOLYMERS OF CONJUGATED DIOLEFINS
Claim 2
Dependent Claim
128 words
IN A PROCESS FOR ENLARGING THE AVERAGE PARTICLE SIZE OF SYNTHETIC RUBBER LATEX WHEREIN THE LATEX IS AGGLOMERATED BY STEPS INCLUDING FREEZING AND THAWING IN WHICH PREFLOC IS FORMED, THE IMPROVEMENT WHICH COMPRISES REDUCING PREFLOC FORMATION BY FREEZING AND THAWING A SYNTHETIC RUBBER LATEX BLEND COMPRISING FROZEN AND THAWED AGGLOMERATED SYNTHETIC RUBBER LATEX AND SYNTHETIC RUBBER LATEX HAVING A SMALLER AVERAGE PARTICLE SIZE THAN THE FROZEN AND THAWED AGGLOMERATED LATEX, EACH 100 PARTS OF THE LATEX BLEND CONTAINING 5-85 PATS OF THE FROZEN AND THAWED AGGLOMERATED LATEX AND 95-15 PARTS OF THE LATEX HAVING A SMALLER AVERAGE PARTICLE SIZE WHEN CALCULATED BY WEIGHT ON A DRY SOLIDS BASIS, THE SYNTHETIC RUBBER LATEX BEING SELECTED FROM LATICES OF THE GROUP CONSISTING OF LATICES OF RUBBERY HOMOPOLYMERS OF CONJUGATED DIOLEFINS
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) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |