Patent DD43221A5 successfully refreshed from Google Patents.
Patent US3086005A successfully refreshed from Google Patents.
US3086005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel chemical compounds and the synthetic preparations thereof
Assignee: Polaroid Corp
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Filing: 1959-01-26
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Granted: 1963-04-16
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Expires: 1979-01-26
Abstract
No abstract record available.
Inventors
- 👤 Elbert M Idelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:59
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/18; C09B43/20; C09B43/202; C09B39/00; C09B43/06; C09B43/08; G; G03; G03C; G03C7/00; G03C7/18; G03C8/00; G03C8/02; G03C8/08; G03C8/10; G03C8/12; G03C8/14; G03C8/16; G03C8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A PROCESS FOR PREPARING AZO DYES WHICH COMPRISES THE STEPS OF OXIDIZING A DYE SELECTED FROM THE GROUP CONSISTING OF MONO- AND DISAZO DYES CHARACTERISTIZED IN THA T SAID DYES CONTAIN NOT LESS THAN ONE AND NOT MORE THAN TWO GROUPS SELECTED FROM THE GROUP CONSISTING OF ORTHOHYDROXYAZO AND ORTHO, ORTHO'' -DIHYDROXYAZO GROUPS, SAID DYES BEING FURTHER CHARACTERIZED IN THAT THEY CONTAIN NOT LESS THAN ONE AND NOT MORE THAN TWO GROUPS SELECTED FROM THE GROUP CONSISTING OF P-DIHYDROXYPHENYL AND O-DIHYDROXYPHENYL GROUPS AND THE HALOGEN AND ALKYL SUBSTITUTED DERIVATIVES THEREOF, TO THEREBY PROVIDE THE QUINONE OXIDATION PRODUCT OF SAID DIHYDROXYPHENYL GROUPS; ACYLATING THE HYDROXYL GROUPS OF SAID ORTHO-HYDROXYAZO AND SAID ORTHO, ORTHO'' -DIHYDROXYAZO GROUPS OF SAID QUINONE OXIDATION PRODUCT; AND THEN REDUCING THE QUINONE OXIDATION PRODUCT OF SAID DIHYDROXYPHENYL GROUPS TO PROVIDE THEREBY RECONSTITUTION OF SAID DIHYDROXYPHENYL GROUPS.
Claim 2
Dependent Claim
138 words
A PROCESS FOR PREPARING AZO DYES WHICH COMPRISES THE STEPS OF OXIDIZING A DYE SELECTED FROM THE GROUP CONSISTING OF MONO- AND DISAZO DYES CHARACTERISTIZED IN THA T SAID DYES CONTAIN NOT LESS THAN ONE AND NOT MORE THAN TWO GROUPS SELECTED FROM THE GROUP CONSISTING OF ORTHOHYDROXYAZO AND ORTHO, ORTHO'' -DIHYDROXYAZO GROUPS, SAID DYES BEING FURTHER CHARACTERIZED IN THAT THEY CONTAIN NOT LESS THAN ONE AND NOT MORE THAN TWO GROUPS SELECTED FROM THE GROUP CONSISTING OF P-DIHYDROXYPHENYL AND O-DIHYDROXYPHENYL GROUPS AND THE HALOGEN AND ALKYL SUBSTITUTED DERIVATIVES THEREOF, TO THEREBY PROVIDE THE QUINONE OXIDATION PRODUCT OF SAID DIHYDROXYPHENYL GROUPS; ACYLATING THE HYDROXYL GROUPS OF SAID ORTHO-HYDROXYAZO AND SAID ORTHO, ORTHO'' -DIHYDROXYAZO GROUPS OF SAID QUINONE OXIDATION PRODUCT; AND THEN REDUCING THE QUINONE OXIDATION PRODUCT OF SAID DIHYDROXYPHENYL GROUPS TO PROVIDE THEREBY RECONSTITUTION OF SAID DIHYDROXYPHENYL GROUPS.
References Cited (Backward Citations)
US2422016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |