US3849376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic polyamide compositions containing aromatic disulfimide compound having an affinity for basic dyes
Assignee: Bayer AG
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Filing: 1973-08-07
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Granted: 1974-11-19
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Expires: 1993-08-07
Abstract
Abstract 1. A FIBER FORMING POLYAMIDE COMPOSITION CONSISTING ESSENTIALLY OF (1) AN AROMATIC CARBOXYLIC POLYAMIDE; AND (2) 50 TO 500 MILLIEQUIVALENTS PER KILOGRAM OF SAID COMPOSITION OF A DISULPHIMIDE HAVING THE FORMULA X-AR-SO2-N(-Z)-SO2-AR''-X OR X-AR-SO2-N(-Z)-SO2-AR"-SO2-N(-Z)-SO2-AR''-X WHEREIN X IS HYDROGEN OR -SO3Z; AR, AR'', AR'''' ARE CARBOCYCLIC AROMATIC RADICALS; AND Z IS HYDROGEN OR ALKALI METAL.
Inventors
- 👤 G Wolf
- 👤 G Blankenstein
- 👤 G Nischk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:16
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/32; C08G69/48; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A FIBER FORMING POLYAMIDE COMPOSITION CONSISTING ESSENTIALLY OF (1) AN AROMATIC CARBOXYLIC POLYAMIDE; AND (2) 50 TO 500 MILLIEQUIVALENTS PER KILOGRAM OF SAID COMPOSITION OF A DISULPHIMIDE HAVING THE FORMULA
Claim 2
Dependent Claim
30 words
A FIBER FORMING POLYAMIDE COMPOSITION CONSISTING ESSENTIALLY OF (1) AN AROMATIC CARBOXYLIC POLYAMIDE; AND (2) 50 TO 500 MILLIEQUIVALENTS PER KILOGRAM OF SAID COMPOSITION OF A DISULPHIMIDE HAVING 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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |