US3705053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly absorbent bonded nonwoven fabrics
Assignee: Rohm and Haas Co
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Filing: 1971-04-16
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Granted: 1972-12-05
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Expires: 1991-04-16
Abstract
Abstract THE PRESENT INVENTION IS CONCERNED WITH NEW AND IMPROVED BINDERS FOR THE PRODUCTION OF NONWOVEN FABRICS WHICH HAVE A HIGH DEGREE OF ABSORBENCY, AND RETAIN THEIR BONDED CHARACTER AS WELL AS ABSORBENCY THROUGH NUMEROUS WASH-DRY CYCLES. THE FABRICS ARE BONDED BY A NOVEL SELFCROSSLINKING BINDER COMPRISING A COPOLYMER OF (A) NMETHYLOLAMINE OR -AMIDE UNITS, (B) SULFONIC ACID UNITS WHICH CONTAIN NO BASIC NITROGEN ATOMS OR GROUP, AND (C) CERTAIN ACRYLIC UNITS OF NEUTRAL BUT MILDLY HYDROPHILIC CHARACTER WHICH CONTAIN NO BASIC NITROGEN ATOMS OR GROUP.
Inventors
- 👤 William D Emmons
- 👤 Vincent J Moser
- 👤 John G Brodnyan
- 👤 Norman Shachat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:56
CPC Classifications
C; C08; C08J; C08J9/00; C08F; C08F246/00; D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/587; D04H1/64; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D06M15/285; D06M15/29; D06M15/356; D06M15/3566; C08J2357/00; C08J2357/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31779; Y10T428/31783; Y10T442/00; Y10T442/60
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |