Patent US2815343A successfully refreshed from Google Patents.
US2815343A
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US
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Polyoxyalkylene derivatives of phenothiazine
Assignee: Dow Chemical Co
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Filing: 1956-12-10
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Granted: 1957-12-03
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Expires: 1976-12-10
Abstract
No abstract record available.
Inventors
- 👤 Lee H Horsley
- 👤 Harold O Seeburger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:11
CPC Classifications
C; C10; C10M; C10M135/00; C10M135/32; C10M135/36; C10M2219/00; C10M2219/10; C10M2219/104; C10M2219/108; C10M2221/00; C10M2221/02; C10N; C10N2040/00; C10N2040/135
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
COMPOUNDS HAVING THE FORMULA
Claim 2
Dependent Claim
4 words
COMPOUNDS HAVING THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-02 | 1961-06-03 | 1961-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-02 | 1965-06-03 | 1965-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-02 | 1969-06-03 | 1969-12-03 | $7700.00 | Window Closed / Lapsed |