US3080418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of trans, cis, trans-1, 2, 4-tricarboxy-cis-3-carboxymethylocylopentane
Assignee: EIDP Inc
•
Filing: 1957-09-23
•
Granted: 1963-03-05
•
Expires: 1977-09-23
Abstract
No abstract record available.
Inventors
- 👤 Robert H Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:15
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4215
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A PROCESS FOR THE PREPARATION OF TRANS,CIS,TRANS1,2,4-TRICARBOXY-CIS-3 - CARBOXYMETHYLCYCLOPENTANE WHICH COMPRISES REACTING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF (A) 5-HYDROXY-5,6-DIHYDRO-EXO-DICYCLOPENTADIENE, (B) 6-HYDROXY-5,6 - DIHYDRO-EXO-DICYCLOPENTADIENE, (C) THE ACETIC ACID ESTER OF 5-HYDROXY-5,6-DIHYDRO-EXO-DICYCLOPENTADIENE, (D) THE ACETIC ACID ESTER OF 6-DIHYDROXY-5,6 - DIHYDRO-EXO-DICYCLOPENTADIENE, (E) THE BENZOIC ACID ESTER OF 5-HYDROXY-5,6-DIHYDRO-EXO-DICYCLOPENTADIENE AND (F) THE BENZOIC ACID ESTER OF 6HYDROXY-5,6-DIHYDRO-EXO-DICYCLO-PENTADIENE WITH AQUEOUS NITRIC ACID OF A CONCENTRATION IN THE RANGE OF FROM ABOUT 30% TO ABOUT 75%, AT A TEMPERATURE BELOW ABOUT 75*C.
Claim 2
Dependent Claim
80 words
A PROCESS FOR THE PREPARATION OF TRANS,CIS,TRANS1,2,4-TRICARBOXY-CIS-3 - CARBOXYMETHYLCYCLOPENTANE WHICH COMPRISES REACTING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF (A) 5-HYDROXY-5,6-DIHYDRO-EXO-DICYCLOPENTADIENE, (B) 6-HYDROXY-5,6 - DIHYDRO-EXO-DICYCLOPENTADIENE, (C) THE ACETIC ACID ESTER OF 5-HYDROXY-5,6-DIHYDRO-EXO-DICYCLOPENTADIENE, (D) THE ACETIC ACID ESTER OF 6-DIHYDROXY-5,6 - DIHYDRO-EXO-DICYCLOPENTADIENE, (E) THE BENZOIC ACID ESTER OF 5-HYDROXY-5,6-DIHYDRO-EXO-DICYCLOPENTADIENE AND (F) THE BENZOIC ACID ESTER OF 6HYDROXY-5,6-DIHYDRO-EXO-DICYCLO-PENTADIENE WITH AQUEOUS NITRIC ACID OF A CONCENTRATION IN THE RANGE OF FROM ABOUT 30% TO ABOUT 75%, AT A TEMPERATURE BELOW ABOUT 75*C.
References Cited (Backward Citations)
US1960211A
Cited
US2615008A
Cited
US2750411A
Cited
US2668807A
Cited
US2806057A
Cited
US2798079A
Cited
US2782233A
Cited
US2798080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |