Patent US3007939A successfully refreshed from Google Patents.
US3007939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-substituted isoindoles
Assignee: Dow Chemical Co
•
Filing: 1959-03-23
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Granted: 1961-11-07
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Expires: 1979-03-23
Abstract
No abstract record available.
Inventors
- 👤 Frederick H Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:09
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/32; C07D207/323; C07D209/00; C07D209/02; C07D209/44; C07F; C07F9/00; C07F9/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
N-SUBSTITUTED ISOINDOLES HAVING THE FORMULA
Claim 2
Dependent Claim
5 words
N-SUBSTITUTED ISOINDOLES HAVING THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-06 | 1965-05-08 | 1965-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-06 | 1969-05-08 | 1969-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-06 | 1973-05-08 | 1973-11-07 | $7700.00 | Window Closed / Lapsed |