US3354032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of paper of cellulose and polyamide fibers
Assignee: Glanzstoff AG
•
Filing: 1964-04-30
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Granted: 1967-11-21
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Expires: 1984-04-30
Abstract
No abstract record available.
Inventors
- 👤 Sommer Erwin
- 👤 Gerlach Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:57
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H5/1254; D21H13/00; D21H13/10; D21H13/20; D21H13/26; D21H17/00; D21H17/20; D21H17/33
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
IN A PROCESS FOR THE PRODUCTION OF A PAPER SHEET FROM AN AQUEOUS DISPERSION OF CELLULOSE AND POLYAMIDE FIBERS BY WATER-LAYING SAID FIBERS AS A FIBROUS WEB ON A PAPER-MAKING MACHINE, THE IMPROVEMENT WHICH COMPRISES: PRETREATING SAID POLYAMIDE FIBERS UNDER AN ACID PH, PRIOR TO COMBINATION WITH THE CELLULOSE FIBERS IN SAID AQUEOUS DISPERSION, WITH AN AQUEOUS SOLUTION OF THE SODIUM SALT OF A STYRENE-MALEIC ACID COPOLYMER.
Claim 2
Dependent Claim
67 words
IN A PROCESS FOR THE PRODUCTION OF A PAPER SHEET FROM AN AQUEOUS DISPERSION OF CELLULOSE AND POLYAMIDE FIBERS BY WATER-LAYING SAID FIBERS AS A FIBROUS WEB ON A PAPER-MAKING MACHINE, THE IMPROVEMENT WHICH COMPRISES: PRETREATING SAID POLYAMIDE FIBERS UNDER AN ACID PH, PRIOR TO COMBINATION WITH THE CELLULOSE FIBERS IN SAID AQUEOUS DISPERSION, WITH AN AQUEOUS SOLUTION OF THE SODIUM SALT OF A STYRENE-MALEIC ACID COPOLYMER.
References Cited (Backward Citations)
US3103462A
Cited
US3095345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |