Patent US2945856A successfully refreshed from Google Patents.
US2945856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2, 4, 6, 8-tetra-tertiarybutylphenoxazine
Assignee: Dow Chemical Co
•
Filing: 1958-08-07
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Granted: 1960-07-19
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Expires: 1978-08-07
Abstract
No abstract record available.
Inventors
- 👤 Herbert B Rickert
- 👤 Werner M Geiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:34
CPC Classifications
C; C07; C07D; C07D265/00; C07D265/28; C07D265/34; C07D265/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
1 words
2,4,6,8-TETRA-TERTIARYBUTYLPHENOXAZINE.
Claim 2
Dependent Claim
1 words
2,4,6,8-TETRA-TERTIARYBUTYLPHENOXAZINE.
References Cited (Backward Citations)
CH268089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |