US3260706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkali-soluble polymeric carboxy ester lactones
Assignee: Eastman Kodak Co
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Filing: 1963-08-26
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Granted: 1966-07-12
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Expires: 1983-08-26
Abstract
No abstract record available.
Inventors
- 👤 S M Minsk
- 👤 Edward P Abel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:44
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/14; C08F8/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A METHOD OF PREPARING ALKALI SOLUBLE POLYMERIC CARBOXY ESTER LACTONES WHICH COMPRISES REACTING ON PART OF A SOLUBLE INTERPOLYMER OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE UNSATURATED ALPHA-BETA-DICARBOXYLIC ACIDS AND ANHYDRIDES AND A VINYL ORGANIC ESTER HAVING AN INHERENT VISCOSITY IN ACETONE AT A CONCENTRATION OF 0.25 GRAM PER 100 ML. OF SOLUTION OF NOT MORE THAN 0.30 WITH AT LEAST 5 PARTS OF A LIQUID FREE OF MONOHYDROXY ACID COMPOSED OF ONE MOLAR PROPORTION OF WATER AND 0.059 MOLAR PROPORTIONS OF A LOWER MONOHYDRC ALCOHOL TOGETHER WITH A MINERAL ACID CATALYST HAVING A STRENGTH ON THE ORDER OF SULFURIC ACID AT ABOVE ROOM TEMPERATURE UNTIL LACTONIZATION OF THE POLYMER HAS OCCURRED.
Claim 2
Independent Claim
115 words
A METHOD OF PREPARING ALKALI SOLUBLE POLYMERIC CARBOXY ESTER LACTONES WHICH COMPRISES REACTING ON PART OF A SOLUBLE INTERPOLYMER OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE UNSATURATED ALPHA-BETA-DICARBOXYLIC ACIDS AND ANHYDRIDES AND A VINYL ORGANIC ESTER HAVING AN INHERENT VISCOSITY IN ACETONE AT A CONCENTRATION OF 0.25 GRAM PER 100 ML. OF SOLUTION OF NOT MORE THAN 0.30 WITH AT LEAST 5 PARTS OF A LIQUID FREE OF MONOHYDROXY ACID COMPOSED OF ONE MOLAR PROPORTION OF WATER AND 0.059 MOLAR PROPORTIONS OF A LOWER MONOHYDRC ALCOHOL TOGETHER WITH A MINERAL ACID CATALYST HAVING A STRENGTH ON THE ORDER OF SULFURIC ACID AT ABOVE ROOM TEMPERATURE UNTIL LACTONIZATION OF THE POLYMER HAS OCCURRED.
References Cited (Backward Citations)
US2306071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |