Patent US2962762A successfully refreshed from Google Patents.
US2962762A
Expired / Lapsed
US
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Manufacture of non-woven two dimensional structures from fibers
Assignee: Hoechst AG
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Filing: 1958-02-12
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Granted: 1960-12-06
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Expires: 1978-02-12
Abstract
No abstract record available.
Inventors
- 👤 Hartmann Adolf
- 👤 Fritzsche Bernhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:16
CPC Classifications
D; D21; D21H; D21H13/00; D21H13/10; D21H13/12; D21H13/16; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4282; D04H1/4309; D04H1/54; D04H1/58; D04H1/64; D04H1/645; D06; D06M; D06M13/00; D06M13/10; D06M13/12; D06M13/127; D06P; D06P3/00; D06P3/58; Y; Y10; Y10S; Y10S264/00; Y10S264/75; Y10S8/00; Y10S8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PROCESS FOR THE MANUFACTURE OF NON-WOVEN ARTICLES OF FIBERS WHICH COMPRISES SHAPING A FIBER MASS COMPRISING POLYVINYL ALCOHOL FIBERS CAPABLE OF SWELLING IN WATER AT A TEMPERATURE RANGING FROM 40 TO 90*C., WITHOUT THE FIBER STRUCTURE BEING CHANGED, INTO A TWO DIMENSIONAL STRUCTURE, HEATING THE SHAPED STRUCTURE IN A SOLVENT CONSISTING ESSENTIALLY OF WATER TO SAID TEMPERATURE WHEREBY THE POLYVINYL ALCOHOL FIBERS SWELL WITHOUT BEING DISSOLVED, AND SUBSEQUENTLY DRYING THE ARTICLES.
Claim 2
Dependent Claim
72 words
A PROCESS FOR THE MANUFACTURE OF NON-WOVEN ARTICLES OF FIBERS WHICH COMPRISES SHAPING A FIBER MASS COMPRISING POLYVINYL ALCOHOL FIBERS CAPABLE OF SWELLING IN WATER AT A TEMPERATURE RANGING FROM 40 TO 90*C., WITHOUT THE FIBER STRUCTURE BEING CHANGED, INTO A TWO DIMENSIONAL STRUCTURE, HEATING THE SHAPED STRUCTURE IN A SOLVENT CONSISTING ESSENTIALLY OF WATER TO SAID TEMPERATURE WHEREBY THE POLYVINYL ALCOHOL FIBERS SWELL WITHOUT BEING DISSOLVED, AND SUBSEQUENTLY DRYING THE ARTICLES.
References Cited (Backward Citations)
US2011914A
Cited
US2265283A
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US2068456A
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US2328992A
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US2294966A
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US2361369A
Cited
US2343330A
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US2522526A
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US2639970A
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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) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |