Patent US3074975A successfully refreshed from Google Patents.
US3074975A
Expired / Lapsed
US
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Naphthacenequinones
Assignee: Wyeth Holdings LLC
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Filing: 1960-11-07
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Granted: 1963-01-22
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Expires: 1980-11-07
Abstract
No abstract record available.
Inventors
- 👤 Mccormick Jerry Robert Daniel
- 👤 Gardner William Elmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:05
CPC Classifications
C; C12; C12P; C12P1/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/886; Y10S435/889
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
13 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OFF THOSE REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
13 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OFF THOSE REPRESENTED BY THE FORMULA:
Claim 3
Dependent Claim
15 words
A PROCESS FOR PRODUCING 2-CARBOXAMIDO-4-DIMETHYLAMINO -1, 3, 10, 12-TERAHYDROXY-6, 11-NAPHTHACENEQUINONE OF THE FORMULA: 1,3,10,12-TETRA(HO-),2-(H2N-CO-),4-((H3C)2-N-)-PERHYDRONAPHTHACENE-6,11 -DIONE
Claim 4
Dependent Claim
15 words
A PROCESS FOR PRODUCING 2-CARBOXAMIDO-4-DIMETHYLAMINO -1, 3, 10, 12-TERAHYDROXY-6, 11-NAPHTHACENEQUINONE OF THE FORMULA: 1,3,10,12-TETRA(HO-),2-(H2N-CO-),4-((H3C)2-N-)-PERHYDRONAPHTHACENE-6,11 -DIONE
References Cited (Backward Citations)
US2734018A
Cited
US2739924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |