Patent US2739138A successfully refreshed from Google Patents.
US2739138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic rubber latices
Assignee: Emulsol Chemical Corp
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Filing: 1951-10-10
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Granted: 1956-03-20
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Expires: 1971-10-10
Abstract
No abstract record available.
Inventors
- 👤 Morris S Kharasch
- 👤 Nudenberg Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:07
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; Y; Y10; Y10S; Y10S526/00; Y10S526/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
IN THE PREPARATION OF SYNTHETIC LATICES BY THE EMULSION POLYMERIZATION OF MIXTURES OF BUTADIENE AND STYRENE IN WHICH THE BUTADIENE PREDOMINATES, THE STEP WHICH COMPRISES CARRYING OUT SAID POLYMERIZATION IN THE PRESENCE OF A SMALL PROPORTION OF A CHEMICAL COMPOUND IN THE FORM OF AN HYDROXYALKYL PRIMARY AMINE IN WHICH AMINE HYDROGEN IS REPLACED BY AN ALIPHATTIC CARBOXYLIC ACID ACYL RADICAL CONTAINING FROM 8 TO 24 CARBON ATOMS AND IN WHICH HYDROXYL HYDROGEN IS REPLACED BY AN ALIPHATIC SULFOPOLYCARBOXYLIC ACID ACYL RADICAL CONTAINING FROM 4 TO 8 CARBON ATOMS.
Claim 2
Dependent Claim
89 words
IN THE PREPARATION OF SYNTHETIC LATICES BY THE EMULSION POLYMERIZATION OF MIXTURES OF BUTADIENE AND STYRENE IN WHICH THE BUTADIENE PREDOMINATES, THE STEP WHICH COMPRISES CARRYING OUT SAID POLYMERIZATION IN THE PRESENCE OF A SMALL PROPORTION OF A CHEMICAL COMPOUND IN THE FORM OF AN HYDROXYALKYL PRIMARY AMINE IN WHICH AMINE HYDROGEN IS REPLACED BY AN ALIPHATTIC CARBOXYLIC ACID ACYL RADICAL CONTAINING FROM 8 TO 24 CARBON ATOMS AND IN WHICH HYDROXYL HYDROGEN IS REPLACED BY AN ALIPHATIC SULFOPOLYCARBOXYLIC ACID ACYL RADICAL CONTAINING FROM 4 TO 8 CARBON ATOMS.
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) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |