US2927065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of processing synthetic rubber latex
Assignee: DSM Copolymer Inc
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Filing: 1957-12-31
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Granted: 1960-03-01
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Expires: 1977-12-31
Abstract
No abstract record available.
Inventors
- 👤 Robert A Gerlicher
- 👤 Jr William P Denson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:32
CPC Classifications
C; C08; C08C; C08C1/00; C08C1/02; C08C1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A METHOD OF SEPARATING DISTILLABLE MATERIAL FROM SYNTHETIC RUBBER LATER COMPRISING PASSING SYNTHETIC RUBBER LATEX CONTAINING DISTILLABLE MATERIAL INTO AN UPPER PORTION OF A COLUMN, PASSING A STRIPPING GAS INTO A LOWER PORTION OF THE COLUMN, STRIPPING AT LEAST A PORTION OF THE DISTILLABLE MATERIAL FROM THE SYNTHETIC RUBBER LATEX BY COUNTERCURRENTLY CONTACTING THE LATEX WITH THE STRIPPING GAS, REDUCING PREFLOC FORMATION IN AT LEAST A PORTION OF THE COLUMN BY PASSING A SMALL BUT EFFECTIVE AMOUNT TO REDUCE PREFLOC FORMATION OF AT LEAST ONE HIGHER ALIPHATIC ALCOHOL HAVING A CARBON CHAIN OF ABOUT 14-25 CARBON ATOMS INTO AN INTERMEDIATE PORTION OF THE COLUMN SUBSTANTIALLY REMOVED FROM THE LATEX AND STRIPPING GAS FEED POINTS, WITHDRAWING STRIPPING GAS CONTAINING VAPORS OF THE DISTILLABLE MATERIAL FROM THE COLUMN, AND WITHDRAWING FROM THE COLUMN SYNTHETIC RUBBER LATEX HAVING AT LEAST A PORTION OF THE DISTILLABLE MATERIAL SEPARATED THEREFROM.
Claim 2
Independent Claim
145 words
A METHOD OF SEPARATING DISTILLABLE MATERIAL FROM SYNTHETIC RUBBER LATER COMPRISING PASSING SYNTHETIC RUBBER LATEX CONTAINING DISTILLABLE MATERIAL INTO AN UPPER PORTION OF A COLUMN, PASSING A STRIPPING GAS INTO A LOWER PORTION OF THE COLUMN, STRIPPING AT LEAST A PORTION OF THE DISTILLABLE MATERIAL FROM THE SYNTHETIC RUBBER LATEX BY COUNTERCURRENTLY CONTACTING THE LATEX WITH THE STRIPPING GAS, REDUCING PREFLOC FORMATION IN AT LEAST A PORTION OF THE COLUMN BY PASSING A SMALL BUT EFFECTIVE AMOUNT TO REDUCE PREFLOC FORMATION OF AT LEAST ONE HIGHER ALIPHATIC ALCOHOL HAVING A CARBON CHAIN OF ABOUT 14-25 CARBON ATOMS INTO AN INTERMEDIATE PORTION OF THE COLUMN SUBSTANTIALLY REMOVED FROM THE LATEX AND STRIPPING GAS FEED POINTS, WITHDRAWING STRIPPING GAS CONTAINING VAPORS OF THE DISTILLABLE MATERIAL FROM THE COLUMN, AND WITHDRAWING FROM THE COLUMN SYNTHETIC RUBBER LATEX HAVING AT LEAST A PORTION OF THE DISTILLABLE MATERIAL SEPARATED THEREFROM.
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) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |