Patent US2795582A successfully refreshed from Google Patents.
US2795582A
Expired / Lapsed
US
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Quinophthalone dyes for hydrophobic fibers
Assignee: EIDP Inc
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Filing: 1956-07-25
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Granted: 1957-06-11
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Expires: 1976-07-25
Abstract
No abstract record available.
Inventors
- 👤 Bauer Albert Webb
- 👤 Belcher Clarence Forest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:24
CPC Classifications
C; C09; C09B; C09B25/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
14 words
A COMPOUND OF THE GROUP CONSISTING OF THE QUATERNARY AMMONIUM SALTS OF THE FORMULA
Claim 2
Dependent Claim
14 words
A COMPOUND OF THE GROUP CONSISTING OF THE QUATERNARY AMMONIUM SALTS OF THE FORMULA
Claim 3
Dependent Claim
20 words
THE PROCESS OF PRODUCING A COMPOUND AS DEFINED IN CLAIM 1, WHICH COMPRISES REACTING A NITRO-3'' -HYDROXYQUINOPHTHALONE OF 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) | 1960-06-10 | 1960-12-10 | 1961-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-10 | 1964-12-10 | 1965-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-10 | 1968-12-10 | 1969-06-11 | $7700.00 | Window Closed / Lapsed |