Patent US3275651A successfully refreshed from Google Patents.
US3275651A
Expired / Lapsed
US
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Nitrogen-containing diaryl compounds
Assignee: Gulf Research and Development Co
•
Filing: 1963-12-16
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Granted: 1966-09-27
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Expires: 1983-12-16
Abstract
No abstract record available.
Inventors
- 👤 Alan F Ellis
- 👤 Johann G D Schulz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:29
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/36; C09B1/42; C10; C10M; C10M5/00; C10M7/00; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/068; C10M2215/08; C10M2215/082; C10M2215/086; C10M2215/12; C10M2215/122; C10M2215/24; C10M2215/28; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
5 words
DIIMIDES OF THE STRUCTURAL FORMULA,
Claim 2
Dependent Claim
5 words
DIIMIDES OF THE STRUCTURAL FORMULA,
Claim 3
Dependent Claim
6 words
DIAMIC ACIDS OF THE STRUCTURAL FORMULA,
Claim 4
Dependent Claim
6 words
DIAMIC ACIDS OF THE STRUCTURAL FORMULA,
Claim 5
Dependent Claim
34 words
TETRAMIDES OF THE STRUCTURAL FORMULA, (3,4-DI(R-N(-R)-CO-)PHENYL)2-X WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, ALKYL GROUPS AND ARYL GROUPS AND X IS SELECTED FROM THE GROUP CONSISTING OF -CO-, -CH(-OH)- AND -CH
Claim 6
Dependent Claim
34 words
TETRAMIDES OF THE STRUCTURAL FORMULA, (3,4-DI(R-N(-R)-CO-)PHENYL)2-X WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, ALKYL GROUPS AND ARYL GROUPS AND X IS SELECTED FROM THE GROUP CONSISTING OF -CO-, -CH(-OH)- AND -CH
References Cited (Backward Citations)
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Cited
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US2886594A
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US3075007A
Cited
US3060191A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |