US2810646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-laid webs comprising water-fibrillated, wet-spun filaments of an acrylonitrile polymer and method of producing them
Assignee: Wyeth Holdings LLC
•
Filing: 1953-09-17
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Granted: 1957-10-22
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Expires: 1973-09-17
Abstract
No abstract record available.
Inventors
- 👤 William M Wooding
- 👤 Norman T Woodberry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:15
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H5/20; D21H5/205; D01; D01D; D01D5/00; D01D5/42; D01D5/423; D21H13/00; D21H13/10; D21H13/12; D21H13/18; Y; Y10; Y10S; Y10S260/00; Y10S260/23; Y10S264/00; Y10S264/08; Y10S264/47
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A WATER-LAID WEB COMPRISING FELTED, HEAT-BONDED, WATER-FIBRILLATED WET-SPUN FILAMENTS OF PAPER-MAKING LENGTH, OF A POLYMER CHOSEN FROM THE GROUP CONSISTING OF POLYMERIZED ACRYLONITRILE AND A COPOLYMERIZED MIXTURE OF
Claim 2
Dependent Claim
28 words
A WATER-LAID WEB COMPRISING FELTED, HEAT-BONDED, WATER-FIBRILLATED WET-SPUN FILAMENTS OF PAPER-MAKING LENGTH, OF A POLYMER CHOSEN FROM THE GROUP CONSISTING OF POLYMERIZED ACRYLONITRILE AND A COPOLYMERIZED MIXTURE OF
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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) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |