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US2848478A
Expired / Lapsed
US
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3-hydrocarbo-2-cyclobutene-1, 2-dicarboxylic acids and their preparation
Assignee: EIDP Inc
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Filing: 1955-12-16
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Granted: 1958-08-19
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Expires: 1975-12-16
Abstract
No abstract record available.
Inventors
- 👤 Burt C Pratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:25
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/123; C08G63/137
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A MEMBER OF THE CLASS CONSISTING OF 3-HYDROCARBO2-CYCLOBUTENE-1,2-DICARBOXYLIC ACIDS AND, SALTS, ESTERS, AMIDES, AND ACID HALIDES THEREOF, WHEREIN THE HYDROCARBO SUBSTITUENT IS A MONOVALENT HYDROCARBON RADICAL FREE FROM ALIPHATIC UNSATURATION IN WHICH THE CARBON ATOM ATTACHED TO THE CYCLOBUTENE RING HAS AT LEAST TWO HYDROGEN ATOMS JOINED TO IT.
Claim 2
Dependent Claim
49 words
A MEMBER OF THE CLASS CONSISTING OF 3-HYDROCARBO2-CYCLOBUTENE-1,2-DICARBOXYLIC ACIDS AND, SALTS, ESTERS, AMIDES, AND ACID HALIDES THEREOF, WHEREIN THE HYDROCARBO SUBSTITUENT IS A MONOVALENT HYDROCARBON RADICAL FREE FROM ALIPHATIC UNSATURATION IN WHICH THE CARBON ATOM ATTACHED TO THE CYCLOBUTENE RING HAS AT LEAST TWO HYDROGEN ATOMS JOINED TO IT.
References Cited (Backward Citations)
US2365703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |