US2861056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resinous carboxy ester-lactones and process for preparing them
Assignee: Eastman Kodak Co
•
Filing: 1953-11-12
•
Granted: 1958-11-18
•
Expires: 1973-11-12
Abstract
No abstract record available.
Inventors
- 👤 Louis M Minsk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:53
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/14; C08F8/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
THE METHOD WHICH COMPRISES HEATING TO AT LEAST 60*C., IN THE PRESENCE OF SULFURIC ACID AS A CATALYST, 1 MOLAR PROPORTION OF AN INTERPOLYMR OF VINYL ACETATE AND MALEIC ANHYDRIDE WITH AT LEAST 2 MOLAR PROPORTIONS OF GLYCOLIC ACID AND THEREBY FORMING A FLEXIBLE WATERINSOLUBLE ALKALI-SOLUBLE CARBOXY ESTER-LACTONE RESIN.
Claim 2
Independent Claim
49 words
THE METHOD WHICH COMPRISES HEATING TO AT LEAST 60*C., IN THE PRESENCE OF SULFURIC ACID AS A CATALYST, 1 MOLAR PROPORTION OF AN INTERPOLYMR OF VINYL ACETATE AND MALEIC ANHYDRIDE WITH AT LEAST 2 MOLAR PROPORTIONS OF GLYCOLIC ACID AND THEREBY FORMING A FLEXIBLE WATERINSOLUBLE ALKALI-SOLUBLE CARBOXY ESTER-LACTONE RESIN.
References Cited (Backward Citations)
US2188272A
Cited
US2306071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |