Patent US3232824A successfully refreshed from Google Patents.
US3232824A
Expired / Lapsed
US
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Method of forming a water-laid fibrous sheet including a thermoplastic resin
Assignee: Evonik Operations GmbH
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Filing: 1962-07-05
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Granted: 1966-02-01
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Expires: 1982-07-05
Abstract
No abstract record available.
Inventors
- 👤 Bader Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:53
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/18; D21H17/19; C; C08; C08F; C08F2/00; C08F2/44; C08F265/00; C08F265/04; C08F265/06; D21H11/00; D21H11/12; D21H13/00; D21H13/10; D21H13/28; D21H13/34; D21H13/36; D21H13/38; D21H13/40; D21H13/42; D21H17/20; D21H17/33; D21H17/34; D21H17/71
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A PROCESS FOR THE PRODUCTION OF FIBROUS MATERIAL ASSOCIATED WITH A THERMOPLASTIC RESIN SUITABLE FOR THE PRODUCTION OF HEAT AND PRESSURE SHAPED PRODUCTS WHICH COMPRISES INCORPORATING A PERIOXIDIC CATALYST IN A LIQUID MONOMER CONTAINING AT LEAST ONE TERMINAL CH2=C< GROUP WHICH IS POLYMERIZABLE TO A THERMOPLASTIC RESIN, PREPARING IN AQUEOUS SUSPENSION OF FIBROUS MATERIAL, PREPARING AN AQUEOUS EMULSION OF THE LIQUID MONOMER CONTAINING THE PEROXIDIC CATALYST, MIXING SAID AQUEOUS FIBRE SUSPENSION AND SAID AQUEOUS EMULSION OF SAID LIQUID MONOMER, BREAKING THE EMULSION OF SAID LIQUID MONOMER IN CONTACT WITH SAID AQUEOUS FIBRE DISPERSION IN SAID MIXTURE, INITIATING POLYMERIZATION OF SUCH MONOMER CONTAINING THE PEROXIDIC CATALYST IN SUCH AQUEOUS FIBRE SUSPENSION, AFTER COMPLETION OF SUCH POLYMERIZATION REMOVING WATER FROM THE SUSPENSION TO PRODUCE A FLEECE FROM THE FIBROUS MATERIAL ASSOCIATED WITH THE POLYMERIZATION PRODUCT AND DRYING SUCH FLEECE AT TEMPERATURES BELOW THE THERMOPLASTIC RANGE OF THE POLYMERIZATION PRODUCT ASSOCIATED WITH THE FIBROUS MATERIAL.
Claim 2
Dependent Claim
152 words
A PROCESS FOR THE PRODUCTION OF FIBROUS MATERIAL ASSOCIATED WITH A THERMOPLASTIC RESIN SUITABLE FOR THE PRODUCTION OF HEAT AND PRESSURE SHAPED PRODUCTS WHICH COMPRISES INCORPORATING A PERIOXIDIC CATALYST IN A LIQUID MONOMER CONTAINING AT LEAST ONE TERMINAL CH2=C< GROUP WHICH IS POLYMERIZABLE TO A THERMOPLASTIC RESIN, PREPARING IN AQUEOUS SUSPENSION OF FIBROUS MATERIAL, PREPARING AN AQUEOUS EMULSION OF THE LIQUID MONOMER CONTAINING THE PEROXIDIC CATALYST, MIXING SAID AQUEOUS FIBRE SUSPENSION AND SAID AQUEOUS EMULSION OF SAID LIQUID MONOMER, BREAKING THE EMULSION OF SAID LIQUID MONOMER IN CONTACT WITH SAID AQUEOUS FIBRE DISPERSION IN SAID MIXTURE, INITIATING POLYMERIZATION OF SUCH MONOMER CONTAINING THE PEROXIDIC CATALYST IN SUCH AQUEOUS FIBRE SUSPENSION, AFTER COMPLETION OF SUCH POLYMERIZATION REMOVING WATER FROM THE SUSPENSION TO PRODUCE A FLEECE FROM THE FIBROUS MATERIAL ASSOCIATED WITH THE POLYMERIZATION PRODUCT AND DRYING SUCH FLEECE AT TEMPERATURES BELOW THE THERMOPLASTIC RANGE OF THE POLYMERIZATION PRODUCT ASSOCIATED WITH THE FIBROUS MATERIAL.
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) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |