US2593840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
mu-phthalimidomethyl derivatives of aniline, nitrobenzene, and nuclear substitution products thereof
Assignee: GAF Chemicals Corp
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Filing: 1949-12-30
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Granted: 1952-04-22
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Expires: 1969-12-30
Abstract
No abstract record available.
Inventors
- 👤 Saul R Buc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:11
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
AN M-PHTHALIMIDOMETHYL DERIVATIVE OF THE CLASS CONSISTING OF ANILINE AND OF NITROBENZENE IN WHICH THE TWO M-POSITIONS OF THE BENZENE NUCLEUS ARE SUBSTITUTED BY A PHTHALIMIDOMETHYL GROUP AND THE REMAINING POSITIONS IN THE BENZENE RING ARE OCCUPIED BY A SUBSTITUENT SELECTED FROM THE CLASS CONSISTING OF HYDROGEN, HALOGEN, HYDROXY, LOWER ALKYL, LOWER ALKOXY, LOWER HYDROXYALKYL, AND MONOCYCLIC CARBOCYCLIC ARALKYL AND ARYLOXY GROUPS.
Claim 2
Dependent Claim
62 words
AN M-PHTHALIMIDOMETHYL DERIVATIVE OF THE CLASS CONSISTING OF ANILINE AND OF NITROBENZENE IN WHICH THE TWO M-POSITIONS OF THE BENZENE NUCLEUS ARE SUBSTITUTED BY A PHTHALIMIDOMETHYL GROUP AND THE REMAINING POSITIONS IN THE BENZENE RING ARE OCCUPIED BY A SUBSTITUENT SELECTED FROM THE CLASS CONSISTING OF HYDROGEN, HALOGEN, HYDROXY, LOWER ALKYL, LOWER ALKOXY, LOWER HYDROXYALKYL, AND MONOCYCLIC CARBOCYCLIC ARALKYL AND ARYLOXY GROUPS.
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) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |