Patent US3137589A successfully refreshed from Google Patents.
US3137589A
Expired / Lapsed
US
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Production of bonded fiber fleeces
Assignee: BASF SE
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Filing: 1959-10-30
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Granted: 1964-06-16
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Expires: 1979-10-30
Abstract
No abstract record available.
Inventors
- 👤 Reinhard Hans
- 👤 Penning Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:14
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/64; D04H1/645; D04H1/587; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A METHOD OF PRODUCING BONDED FIBER FLEECES WHICH COMPRISES: CONTACTING A FIBER FLEECE WITH AN AQUEOUS DISPERSION OF A WATER-INSOLUBEL COPOLYMER OF (A) 1 TO 20% BY WEIGHT OF AN UNSATURATED CARBOXYLIC ACID AMIDE SUBSTITUTED ON NITROGEN BY AT LEAST ONE METHYLOL GROUP, AND (B) 80 TO 99% BY WEIGHT OF ANOTHER ETHYLENICALLY UNSATURATED POLYMERIZABLE COMPOUND; AND HEATING SAID FIBER FLEECE CONTAINING SAID WATER-INSOLUBLE COPOLYMER AS A BINDING AGENT AT A TEMPERATURE BETWEEN 60*C. AND 160*C.
Claim 2
Independent Claim
76 words
A METHOD OF PRODUCING BONDED FIBER FLEECES WHICH COMPRISES: CONTACTING A FIBER FLEECE WITH AN AQUEOUS DISPERSION OF A WATER-INSOLUBEL COPOLYMER OF (A) 1 TO 20% BY WEIGHT OF AN UNSATURATED CARBOXYLIC ACID AMIDE SUBSTITUTED ON NITROGEN BY AT LEAST ONE METHYLOL GROUP, AND (B) 80 TO 99% BY WEIGHT OF ANOTHER ETHYLENICALLY UNSATURATED POLYMERIZABLE COMPOUND; AND HEATING SAID FIBER FLEECE CONTAINING SAID WATER-INSOLUBLE COPOLYMER AS A BINDING AGENT AT A TEMPERATURE BETWEEN 60*C. AND 160*C.
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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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |