Patent US3076816A successfully refreshed from Google Patents.
US3076816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing j-phenyl-z
Assignee: —
•
Filing: —
•
Granted: 1963-02-05
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Expires: 1980-02-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:32
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/34; C07D207/36; C07D207/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
PROCESS OF PRODUCING 3-PHENYL-2,4-PYRROLIDINEDIONE COMPOUNDS, WHICH COMPRISES REACTING A 4-PHTHALIMIDO ACETOACETIC ACID ESTER HAVING THE FORMULA
Claim 2
Dependent Claim
16 words
PROCESS OF PRODUCING 3-PHENYL-2,4-PYRROLIDINEDIONE COMPOUNDS, WHICH COMPRISES REACTING A 4-PHTHALIMIDO ACETOACETIC ACID ESTER HAVING THE FORMULA
References Cited (Backward Citations)
US2328232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |