Patent US2849447A successfully refreshed from Google Patents.
US2849447A
Expired / Lapsed
US
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Nitro diarylamine methine dyes
Assignee: GAF Chemicals Corp
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Filing: 1955-09-19
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Granted: 1958-08-26
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Expires: 1975-09-19
Abstract
No abstract record available.
Inventors
- 👤 Nicholas J Kartinos
- 👤 William W Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:59
CPC Classifications
C; C07; C07C; C07C255/00; C09; C09B; C09B23/00; C09B23/14; C09B23/143; C09B51/00; D; D06; D06P; D06P5/00; D06P5/001; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921; Y10S8/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
COMPOUNDS HAVING THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
6 words
COMPOUNDS HAVING THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |