US3842519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deodorizer sheet material
Assignee: Combe Inc
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Filing: 1973-01-26
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Granted: 1974-10-22
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Expires: 1993-01-26
Abstract
Abstract Shoe inserts are produced comprising a sole-shaped sheet or the like of foamed latex impregnated with activated charcoal. When such a shaped sheet is used as a shoe insert or insole it is found to substantially reduce or even eliminate foot odors frequently associated with perspiring feet.
Inventors
- 👤 H Lapidus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:44
CPC Classifications
A; A43; A43B; A43B17/00; A43B17/10; A43B1/00; A43B1/0045; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249986; Y10T428/249987; Y10T428/249988; Y10T428/249989
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
A SHOE INSERT FOR ABSORBING ODORS RESULTING FROM PERSPIRING FEET COMPRISING A CURED SHEET OF OPENCELLED FOAM, AT LEAST ONE SIDE OF THE SHEET HAVING A RELATIVELY SMOOTH SKIN FORMED DURING CURING WHICH IS IMPERVIOUS TO PASSAGE OF CHARCOAL PARTICLES, SAID FOAM CONTAINING HOMOGENEOUSLY DISTRIBUTED THROUGH THE SOLID PART THEREOF FINELY DIVIDED ACTIVATED CHARCOAL PARTICLES IN AN AMOUNT EFFECTIVE TO ABSORB ODORS WHEN SAID SHEET IS SUBJECTED TO CONTACT WITH FOOT PERSPIRATION AND TO PASSAGE OF ODOR-FILLED AIR THROUGH INTERSTITIAL SPACES WITHIN SAID FOAM, SAID CHARCOAL PARTICLES HAVING BEEN INCORPORATED PRIOR TO FROTHING AND CURING OF SAID FOAM.
Claim 2
Dependent Claim
98 words
A SHOE INSERT FOR ABSORBING ODORS RESULTING FROM PERSPIRING FEET COMPRISING A CURED SHEET OF OPENCELLED FOAM, AT LEAST ONE SIDE OF THE SHEET HAVING A RELATIVELY SMOOTH SKIN FORMED DURING CURING WHICH IS IMPERVIOUS TO PASSAGE OF CHARCOAL PARTICLES, SAID FOAM CONTAINING HOMOGENEOUSLY DISTRIBUTED THROUGH THE SOLID PART THEREOF FINELY DIVIDED ACTIVATED CHARCOAL PARTICLES IN AN AMOUNT EFFECTIVE TO ABSORB ODORS WHEN SAID SHEET IS SUBJECTED TO CONTACT WITH FOOT PERSPIRATION AND TO PASSAGE OF ODOR-FILLED AIR THROUGH INTERSTITIAL SPACES WITHIN SAID FOAM, SAID CHARCOAL PARTICLES HAVING BEEN INCORPORATED PRIOR TO FROTHING AND CURING OF SAID FOAM.
Claim 3
Dependent Claim
19 words
The article of claim 1 wherein the charcoal is present in the amount of about 10.2 to 35 percent.
Claim 4
Dependent Claim
38 words
The article of claim 1 wherein the other side has a backing layer of a material which is pervious to passage of air, at least the outer surface of said layer being free of finely divided activated charcoal.
Claim 5
Dependent Claim
12 words
The product of claim 1 wherein said foam is formed of latex.
Claim 6
Dependent Claim
11 words
The product of claim 2 wherein said material is a textile.
Claim 7
Dependent Claim
24 words
The product of claim 1 wherein said foam is selected from the group consisting of latex foams, polyurethane foams, and vinyl chloride plastisol foams.
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) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |