Patent US2913303A successfully refreshed from Google Patents.
US2913303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing of polyacrylonitrile and copolymers of acrylonitrile
Assignee: BASF SE
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Filing: 1957-04-17
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Granted: 1959-11-17
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Expires: 1977-04-17
Abstract
No abstract record available.
Inventors
- 👤 Baumann Hans
- 👤 Arnemann Friedrich
- 👤 Eisele Julius
- 👤 Federkiel Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:03
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/16; D; D06; D06P; D06P3/00; D06P3/70; D06P3/76; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A POLYMER COMPRISING AT LEAST 50% BY WEIGHT OF ACRYLONITRILE DYED WITH A WATER-SOLUBLE BASIC DIAZACYANINE DYESTUFF WHICH IS A RESONANCE-HYBRID BETWEEN THE GENERAL FORMULAE IA AND IB
Claim 2
Dependent Claim
28 words
A POLYMER COMPRISING AT LEAST 50% BY WEIGHT OF ACRYLONITRILE DYED WITH A WATER-SOLUBLE BASIC DIAZACYANINE DYESTUFF WHICH IS A RESONANCE-HYBRID BETWEEN THE GENERAL FORMULAE IA AND IB
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) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |