US3190847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agglomeration and concentration of synthetic latex
Assignee: Polysar Ltd
•
Filing: 1962-10-22
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Granted: 1965-06-22
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Expires: 1982-10-22
Abstract
No abstract record available.
Inventors
- 👤 Joseph M Mitchell
- 👤 David C Chalmers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:35
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/14; C08C; C08C1/00; C08C1/02; C08C1/065; C08C1/07; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4833
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
THE PROCESS FOR AGGLOMERATING THE PARTICLES OF AN AQUEOUS LATEX CONTAINING A RUBBERY POLYMER OF A BUTADIENE-1,3 MONOMER TO PROVIDE AN AQUEOUS LATEX OF THE THUS AGGLOMERATED PARTICLES, THE PROCESS COMPRISING DISPERSING A CROSSLINKED POLYURETHANE IN SAID LATEX WHEREBY TO AGGLOMERATE THE LATEX PARTICLES AND THUS PERMIT THE LATEX TO BE CONCENTRATED TO A HIGHER DEGREE AT EQUIVALENT VISCOSITY THAN IS POSSIBLE IN THE ABSENCE OF SUCH POLYURETHANE, SAID POLYURETHANE BEING ADDED IN AMOUNT OF FROM ABOUT 0.01 TO ABOUT 7.0 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF THE POLYMER SOLIDS IN THE LATEX AND BEING CHARACTERIZED BY A SOLUBILITY IN WATER A 25*C. OF FROM ABOUT 0.01 TO ABOUT 10.0 GRAMS PER 100 GRAMS OF WATER.
Claim 2
Dependent Claim
119 words
THE PROCESS FOR AGGLOMERATING THE PARTICLES OF AN AQUEOUS LATEX CONTAINING A RUBBERY POLYMER OF A BUTADIENE-1,3 MONOMER TO PROVIDE AN AQUEOUS LATEX OF THE THUS AGGLOMERATED PARTICLES, THE PROCESS COMPRISING DISPERSING A CROSSLINKED POLYURETHANE IN SAID LATEX WHEREBY TO AGGLOMERATE THE LATEX PARTICLES AND THUS PERMIT THE LATEX TO BE CONCENTRATED TO A HIGHER DEGREE AT EQUIVALENT VISCOSITY THAN IS POSSIBLE IN THE ABSENCE OF SUCH POLYURETHANE, SAID POLYURETHANE BEING ADDED IN AMOUNT OF FROM ABOUT 0.01 TO ABOUT 7.0 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF THE POLYMER SOLIDS IN THE LATEX AND BEING CHARACTERIZED BY A SOLUBILITY IN WATER A 25*C. OF FROM ABOUT 0.01 TO ABOUT 10.0 GRAMS PER 100 GRAMS OF WATER.
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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |