Patent US4234652A successfully refreshed from Google Patents.
US4234652A
Expired / Lapsed
US
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Microfibrous structures
Assignee: Anic SpA
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Filing: 1979-04-06
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Granted: 1980-11-18
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Expires: 1999-04-06
Abstract
Abstract Microfibers of thermoplastic polymeric materials which have occluded therein materials such as pigments, dyestuffs, medicaments and other man-made or synthetic materials that can be released therefrom as desired.
Inventors
- 👤 Pier L. Vanoni
- 👤 Giancarlo Serboli
- 👤 Franco De Marchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:41
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/11; D01F; D01F1/00; D01F1/02; D01F1/04; D01F1/10; Y; Y10; Y10S; Y10S428/00; Y10S428/903; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T442/00; Y10T442/60; Y10T442/608; Y10T442/609; Y10T442/614; Y10T442/625
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
89 words
A microfiber of irregular cross section having a length ranging from 1 to 10 millimeters with an average diameter of about 1.0 micron consisting of a synthetic, fiber-forming, thermoplastic polymeric material selected from the group consisting of low-density polyethylene, copolymers of ethylene with vinyl acetate and acrylic acid, high density polyethylene, relevant ethylene copolymers, polypropylene, polyvinyl acetate, polyvinyl alcohol, polystyrene, polyamides, polyethylene terephthalate, cellulose acetate, polyvinyl chloride, and having incorporated therewith by adsorption a material selected from the group consisting of medicaments, antiseptics, pesticides, microorganisms preservatives and sequestering agents.
Claim 2
Dependent Claim
89 words
A microfiber of irregular cross section having a length ranging from 1 to 10 millimeters with an average diameter of about 1.0 micron consisting of a synthetic, fiber-forming, thermoplastic polymeric material selected from the group consisting of low-density polyethylene, copolymers of ethylene with vinyl acetate and acrylic acid, high density polyethylene, relevant ethylene copolymers, polypropylene, polyvinyl acetate, polyvinyl alcohol, polystyrene, polyamides, polyethylene terephthalate, cellulose acetate, polyvinyl chloride, and having incorporated therewith by adsorption a material selected from the group consisting of medicaments, antiseptics, pesticides, microorganisms preservatives and sequestering agents.
Claim 3
Dependent Claim
11 words
A tabloid comprised of compressed microfibers as claimed in claim 1.
Claim 4
Dependent Claim
9 words
Sheet comprised of microfibers as claimed in claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-18 | 1984-05-19 | 1984-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-18 | 1988-05-19 | 1988-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-18 | 1992-05-19 | 1992-11-18 | $7700.00 | Window Closed / Lapsed |