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 Title: |
US4856509:
Face mask and method
[ Derwent Title ]
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Country:
Kind: |
US United States of America
A PATENT [FROM BEGIN UNTIL END 2000] or PATENT ISSUED AFTER 1ST PUB. WITHIN THE TVPP i
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| Inventor: |
LEMELSON JEROME H; United States of America
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| Assignee: |
LEMELSON JEROME H United States of America
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| Published / Filed: |
1989-08-15
/ 1985-07-08
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| Application Number: |
US1985000752829
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| IPC Code: |
Advanced:
A41D 13/11;
A62B 23/02;
A62D 9/00;
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| ECLA Code: |
A62D9/00; A41D13/11B8B; A41D13/11M; A62B23/02A;
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| U.S. Class: |
128/206.19;
128/206.16;
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| Priority Number: |
| 1985-07-08 |
US1985000752829 |
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| Abstract: |
This invention relates to improvements in face masks, particularly for use in preventing the spread of disease such as colds, influenza and the like wherein a select portion or portions of such mask contain a disease or viral destroying chemical or biological agent, such as an acid or other material impregnating or forming part of a portion of the mask, such as that portion which extends across the nasal and mouth portions of the face of a wearer. In one form, the chemical or biological agent is in the form of a solid, such as a coating or a multitude of particles or crystals disposed against a porous portion of the mask or an insert which is attachable to and replaceable with respect to a mask frame or holding unit. In another form, such chemical is in the form of a liquid. In a third form, such chemical is disposed within a multitude of micro capsules which are ruptured or otherwise activated when the mask is used and which dispense their contents during such use and distribute the same throughout a select portion of the mask. In a particular form, the mask is formed of a unitary sheet of porous paper, cellular plastic or non-woven fiber with a portion of the outer layer thereof impregnated with a viral killing chemical, such as citric acid, to prevent passage of viral agents either from a person using the mask or from the atmosphere.
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| Maintenance Status: |
E1 Expired Check current status
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| INPADOC Legal Status: |
| Gazette date |
Code |
Description (remarks) List all possible codes for US |
| 2000-11-27 |
FPAY + |
Fee payment
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| 1997-01-06 |
FPAY + |
Fee payment
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| 1993-11-02 |
FP - |
Expired due to failure to pay maintenance fee
( 1993-08-15 )
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| 1993-10-05 |
FPAY + |
Fee payment
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| 1993-10-05 |
SULP + |
Surcharge for late payment
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| 1993-03-16 |
REMI |
Maintenance fee reminder mailed
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Family Legal Status Report
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