Patent US3371092A successfully refreshed from Google Patents.
US3371092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-amino-n-polyalkylphenyl-1, 8-naphthalic imides
Assignee: Honeywell International Inc
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Filing: 1965-07-22
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Granted: 1968-02-27
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Expires: 1985-07-22
Abstract
No abstract record available.
Inventors
- 👤 Chi K Dien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:46
CPC Classifications
C; C07; C07D; C07D221/00; C07D221/02; C07D221/04; C07D221/06; C07D221/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A 4-AMINO-N-ARYL-1,8-NAPHTHALIC IMIDE, SUITABLE AS A COLORANT, OF THE FORMULA:
Claim 2
Dependent Claim
10 words
A 4-AMINO-N-ARYL-1,8-NAPHTHALIC IMIDE, SUITABLE AS A COLORANT, OF THE FORMULA:
References Cited (Backward Citations)
US1836529A
Cited
US3096333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |