US2981738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heterocyclic nitrogen derivatives of bis(p-dialkylaminophenyl) methane
Assignee: Honeywell International Inc
•
Filing: 1958-05-12
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Granted: 1961-04-25
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Expires: 1978-05-12
Abstract
No abstract record available.
Inventors
- 👤 Frederick H Kranz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:52
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/32; C07D207/325; B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/136; B41M5/1366; C07D209/00; C07D209/02; C07D209/04; C07D209/08; C07D209/56; C07D209/80; C07D209/82; C07D209/86; C07D249/00; C07D249/16; C07D249/18; C07D295/00; C07D295/04; C07D295/12; C07D295/135; C09; C09B; C09B11/00; C09B11/04; C09B11/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
HETEROCYCLIC DERIVATIVES OF BIS(P-DIALKYLAMINOARYL)METHANE HAVING THE FORMULA
Claim 2
Dependent Claim
7 words
HETEROCYCLIC DERIVATIVES OF BIS(P-DIALKYLAMINOARYL)METHANE HAVING THE FORMULA
References Cited (Backward Citations)
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Cited
US2361329A
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US1155878A
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US2547307A
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US2708197A
Cited
US2701799A
Cited
US2900388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |