Filter paper

Patent 4495030 Issued on January 22, 1985. Estimated Expiration Date:

December 15, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Composite nonwoven web
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Method for separating gases liquid droplets and/or solid particles from gases or vapors
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Issued on: 03/15/1983
Inventor: Perrotta

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Inventor

Giglia, Robert D.

Assignee

American Cyanamid Company

Application

No. 06/561752 filed on 12/15/1983

US Classes:

162/145, Mineral162/146, Synthetic (including chemically modified cellulose)162/149, Fibers of different dimensions162/181.9, Free metal or free carbon containing428/421, Of fluorinated addition polymer from unsaturated monomers428/903, MICROFIBER (LESS THAN 100 MICRON DIAMETER)442/415, Containing at least two chemically different strand or fiber materials442/80, Also specified as oil repellent442/82, Fluorocarbon containing55/527, Fibrous or strand form55/528Organic (e.g., vegetable)

Examiners

Primary: Cannon, James C.

Attorney, Agent or Firm

Hultquist; Steven J.

International Classes

A62D 9/00 (20060101)
A62D 9/00 (20060101)
B01D 39/20 (20060101)
B01D 39/20 (20060101)
A62B 23/00 (20060101)
A62B 23/00 (20060101)
D21H 13/00 (20060101)
D21H 13/00 (20060101)
D21H 13/50 (20060101)
D21H 13/50 (20060101)
D21H 13/40 (20060101)
D21H 13/40 (20060101)
D21H 27/08 (20060101)
D21H 27/08 (20060101)
D21H 17/67 (20060101)
D21H 17/67 (20060101)
D21H 13/18 (20060101)
D21H 13/18 (20060101)
D21H 17/00 (20060101)
D21H 17/00 (20060101)

Abstract

A high efficiency, toxic vapor absorptive non-woven filter material comprising a wet-laid sheet containing fibrillated binder fiber, active carbon and submicron size glass fiber.