US2899462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of z-carboxy-z-cakboxymeth-
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
•
Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:58
CPC Classifications
C; C07; C07C; C07C61/00; C07C61/16; C07C61/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
THE PROCESS OF PRODUCING 2-CARBOXY-2-CARBOXYMETHYL-BICYLCO-(2.2.1)-HEPT-5-ENE WHICH COMPRISES THE STEPS OF REACTING SUBSTANTILLY EQUIMOLECULAR PROPORTIONS OF CYCLOPENTADIENE AND ITACONIC ACID IN AN AQUEOUS ORGANIC SOLVENT, THE ORGANIC PORTION OF SAID SOLVENT CONSISTING OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALKANOLDS AND KETONES CONTAINING A TOTAL OF UP TO FOUR CARBON ATOMS AND MIXTURES THEREOF, THE AMOUNT OF SAID ORGAINC SOLVENT BEING SUFFICIENT TO DISSOLVE SAID CYCLOPENTADIENE AND THE AMOUNT OF WATER IN SAID AQUEOUS ORGANIC SOLVENT BEING SUFFICIENT TODISSOLVE SAID ITACONIC ACID AT THE REACTION TEMPERATURE EMPLOYED, THE TEMPERATURE OF REACTION BEING FROM ABOUT 15 TO ABOUT 100*C. AND THE TIME OF REACTION BEING AT LEAST TWO HOURS, AND SEPARATING RESULTING PRODUCT.
Claim 2
Dependent Claim
113 words
THE PROCESS OF PRODUCING 2-CARBOXY-2-CARBOXYMETHYL-BICYLCO-(2.2.1)-HEPT-5-ENE WHICH COMPRISES THE STEPS OF REACTING SUBSTANTILLY EQUIMOLECULAR PROPORTIONS OF CYCLOPENTADIENE AND ITACONIC ACID IN AN AQUEOUS ORGANIC SOLVENT, THE ORGANIC PORTION OF SAID SOLVENT CONSISTING OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALKANOLDS AND KETONES CONTAINING A TOTAL OF UP TO FOUR CARBON ATOMS AND MIXTURES THEREOF, THE AMOUNT OF SAID ORGAINC SOLVENT BEING SUFFICIENT TO DISSOLVE SAID CYCLOPENTADIENE AND THE AMOUNT OF WATER IN SAID AQUEOUS ORGANIC SOLVENT BEING SUFFICIENT TODISSOLVE SAID ITACONIC ACID AT THE REACTION TEMPERATURE EMPLOYED, THE TEMPERATURE OF REACTION BEING FROM ABOUT 15 TO ABOUT 100*C. AND THE TIME OF REACTION BEING AT LEAST TWO HOURS, AND SEPARATING RESULTING PRODUCT.
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) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |