US3235534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamides containing phosphinic acids with improved affinity for dyes
Assignee: Monsanto Co
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Filing: 1960-07-15
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Granted: 1966-02-15
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Expires: 1980-07-15
Abstract
No abstract record available.
Inventors
- 👤 Jr George H Brinkman
- 👤 Donald L Elbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:48
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5313; Y; Y10; Y10S; Y10S260/00; Y10S260/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A FIBER-FORMING SYNTHETIC LINEAR POLYCARBONAMIDE, HAVING IMPROVED RECEPTIVITY FOR ANIONIC DYES, OF THE TYPE HAVING RECURRING AMIDE GROUPS AS AN INTEGRAL PART OF THE MAIN POLYMER CHAIN, AND WHEREIN SAID GROUPS ARE SEPARATED BY AT LEAST 2 CARBON ATOMS, WHICH COMPRISES THE PRODUCT OBTAINED BY POLYMERIZING A POLYAMIDE-FORMING COMPOSITION COMPRISING SUBSTANTIALLY EQUIMOLAR PROPORTIONS OF AT LEAST ONE DICARBOXYLIC ACID, OF THE FORMULA HOOCRCOOH WHEREIN R IS A DIVALENT HYDROCARBON RADICAL HAVING A CHAIN LENGTH OF AT LEAST 2 CARBON ATOMS AND AT LEAST ONE DIAMINE OF THE FORMULA NH2(CH2)NNH2 WHEREIN N IS AN INTEGER OF AT LEAST 2, AND FROM 0.70 TO 14.0 MOL PERCENT, BASED ON SAID POLYAMIDE-FORMING COMPOSITION, OF A MODIFYING AGENT SELECTED FROM THE GROUP CONSISTING OF PHOSPHINIC ACIDS REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
126 words
A FIBER-FORMING SYNTHETIC LINEAR POLYCARBONAMIDE, HAVING IMPROVED RECEPTIVITY FOR ANIONIC DYES, OF THE TYPE HAVING RECURRING AMIDE GROUPS AS AN INTEGRAL PART OF THE MAIN POLYMER CHAIN, AND WHEREIN SAID GROUPS ARE SEPARATED BY AT LEAST 2 CARBON ATOMS, WHICH COMPRISES THE PRODUCT OBTAINED BY POLYMERIZING A POLYAMIDE-FORMING COMPOSITION COMPRISING SUBSTANTIALLY EQUIMOLAR PROPORTIONS OF AT LEAST ONE DICARBOXYLIC ACID, OF THE FORMULA HOOCRCOOH WHEREIN R IS A DIVALENT HYDROCARBON RADICAL HAVING A CHAIN LENGTH OF AT LEAST 2 CARBON ATOMS AND AT LEAST ONE DIAMINE OF THE FORMULA NH2(CH2)NNH2 WHEREIN N IS AN INTEGER OF AT LEAST 2, AND FROM 0.70 TO 14.0 MOL PERCENT, BASED ON SAID POLYAMIDE-FORMING COMPOSITION, OF A MODIFYING AGENT SELECTED FROM THE GROUP CONSISTING OF PHOSPHINIC ACIDS REPRESENTED BY 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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |