Patent US3094516A successfully refreshed from Google Patents.
US3094516A
Expired / Lapsed
US
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Azo dyestuffs containing a benzene ring substituted by two hydroxyethylsul fonylmethyl groups
Assignee: GAF Chemicals Corp
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Filing: 1959-12-30
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Granted: 1963-06-18
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Expires: 1979-12-30
Abstract
No abstract record available.
Inventors
- 👤 David I Randall
- 👤 Saul R Buc
- 👤 Harlan B Freyermuth
- 👤 Raymond L Mayhew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:54
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/503; C09B62/507; C09B62/51
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
AN AZO DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
6 words
AN AZO DYESTUFF OF THE 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) | 1966-06-17 | 1966-12-17 | 1967-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-17 | 1970-12-17 | 1971-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-17 | 1974-12-17 | 1975-06-18 | $7700.00 | Window Closed / Lapsed |