Patent US3007930A successfully refreshed from Google Patents.
US3007930A
Expired / Lapsed
US
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Beta-phase dihydroquinacridone and process
Assignee: EIDP Inc
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Filing: 1958-01-24
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Granted: 1961-11-07
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Expires: 1978-01-24
Abstract
No abstract record available.
Inventors
- 👤 Charles W Manger
- 👤 Ehrich Felix Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:42
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0025; C09B67/0027; C09B48/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
AS A COMPOSITION OF MATTER, BETA CRYSTAL PHASE 6,13DIHYDROQUINACRIDONE HAVING THE FOLLOWING STRUCTURAL FORMULA
Claim 2
Dependent Claim
14 words
AS A COMPOSITION OF MATTER, BETA CRYSTAL PHASE 6,13DIHYDROQUINACRIDONE HAVING THE FOLLOWING STRUCTURAL 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) | 1964-11-06 | 1965-05-08 | 1965-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-06 | 1969-05-08 | 1969-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-06 | 1973-05-08 | 1973-11-07 | $7700.00 | Window Closed / Lapsed |