Patent US4855782A successfully refreshed from Google Patents.
Patent US3153040A successfully refreshed from Google Patents.
US3153040A
Expired / Lapsed
US
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Piperazine complexes of 6-chromanols
Assignee: Eastman Kodak Co
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Filing: 1962-04-26
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Granted: 1964-10-13
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Expires: 1982-04-26
Abstract
No abstract record available.
Inventors
- 👤 Charles D Robeson
- 👤 Donald R Nelan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:36
CPC Classifications
C; C11; C11B; C11B5/00; C11B5/0021; C11B5/0035; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/58; C07D311/70; C07D311/72; C07J; C07J75/00; C07J9/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
27 words
A COMPLEX OF A 6-CHROMANOL AND A PIPERAZINE COMPOUND SELECTED FROM THE GROUP CONSISTING OF PIPERAZINE AND C-METHYLA DN C-ETHYL SUBSTITUTED PIPERAZINE AND 6CHROMANOL HAVING THE FORMULA:
Claim 2
Dependent Claim
27 words
A COMPLEX OF A 6-CHROMANOL AND A PIPERAZINE COMPOUND SELECTED FROM THE GROUP CONSISTING OF PIPERAZINE AND C-METHYLA DN C-ETHYL SUBSTITUTED PIPERAZINE AND 6CHROMANOL HAVING THE FORMULA:
Claim 3
Dependent Claim
14 words
A PROCESS FOR MAKING A COMPLES OF A 6-CHROMANOL ACCORDING TO THE GENERAL FORMULA:
Claim 4
Dependent Claim
14 words
A PROCESS FOR MAKING A COMPLES OF A 6-CHROMANOL ACCORDING TO THE GENERAL FORMULA:
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |