US2845420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dioxazine dyestuffs
Assignee: GAF Chemicals Corp
•
Filing: 1956-10-26
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Granted: 1958-07-29
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Expires: 1976-10-26
Abstract
No abstract record available.
Inventors
- 👤 Harlan B Freyermuth
- 👤 Robert D Jackson
- 👤 David I Randall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:38
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0001; C09B67/0017; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/553; C07F9/572; C07F9/6561; C09B19/00; C09B19/02; C09B69/00; C09B69/007; D; D06; D06P; D06P1/00; D06P1/22; D06P1/227
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A PHOSPHONATED DIOXAZINE DYESTUFF HAVING THE FORMULA
Claim 2
Dependent Claim
7 words
A PHOSPHONATED DIOXAZINE DYESTUFF HAVING THE 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) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |