Patent US3033847A successfully refreshed from Google Patents.
US3033847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cationic monoazo dyes for acrylic and polyester fibers
Assignee: EIDP Inc
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Filing: 1959-11-30
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Granted: 1962-05-08
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Expires: 1979-11-30
Abstract
No abstract record available.
Inventors
- 👤 Sartori Mario Francesco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:48
CPC Classifications
C; C09; C09B; C09B44/00; C09B44/02; C09B44/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A CATIONIC AZO DYE OF THE FORMULA
Claim 2
Dependent Claim
7 words
A CATIONIC AZO DYE OF THE FORMULA
References Cited (Backward Citations)
CA556218A
Cited
DE477913C
Cited
DE501623C
Cited
US2864812A
Cited
US2889315A
Cited
US2972508A
Cited
US2893816A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |