US4047505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insect repellent collar
Assignee: Secretary of State for Defence Canada
•
Filing: 1976-08-02
•
Granted: 1977-09-13
•
Expires: 1996-08-02
Abstract
Abstract A device is disclosed for protection of a wearer's exposed skin against biting insects, and consists of a collar having a backing strip resistant to passage of liquid therethrough, an absorbent layer of open-cell solid resin foam impregnated with finely divided absorbent, and an outer porous covering. Liquid insect repellent is applied to the collar and absorbed, but then desorbs and evaporates at a slow rate to provide efficient protection when the collar is worn. Longer term protection using less chemical repellent than conventional methods is provided.
Inventors
- 👤 John Madden McAndless
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:28
CPC Classifications
A; A01; A01K; A01K27/00; A01K27/007; A01N; A01N25/00; A01N25/34
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
119 words
A collar for use in protecting exposed skin of a wearer's face and neck against biting insets which comprises: a. a backing strip resistant to the passage of liquid therethrough having a fastening means at the ends thereof, b. an absorbent layer adjacent the backing strip and being formed of an open-cell solid resin foam impregnated with a finely divided particulate absorbent material capable of absorbing liquid-repellent chemical which then slowly desorbs and evaporates, the rate of evaporation being controlled by the structure of the resin foam c. a porous outer covering adjacent the absorbent layer and being secured to the backing strip, and d. N, N-diethyl-meta-toluamide insect repellent applied to the porous outer covering adjacent the absorbent layer.
Claim 2
Dependent Claim
119 words
A collar for use in protecting exposed skin of a wearer's face and neck against biting insets which comprises: a. a backing strip resistant to the passage of liquid therethrough having a fastening means at the ends thereof, b. an absorbent layer adjacent the backing strip and being formed of an open-cell solid resin foam impregnated with a finely divided particulate absorbent material capable of absorbing liquid-repellent chemical which then slowly desorbs and evaporates, the rate of evaporation being controlled by the structure of the resin foam c. a porous outer covering adjacent the absorbent layer and being secured to the backing strip, and d. N, N-diethyl-meta-toluamide insect repellent applied to the porous outer covering adjacent the absorbent layer.
Claim 3
Dependent Claim
21 words
A collar as claimed in claim 1, wherein the absorbent layer is open-cell foamed polyurethane impregnated with finely divided activated charcoal.
Claim 4
Dependent Claim
21 words
A collar as claimed in claim 2, wherein the polyurethane foam is impregnated with about 5-12 mg/cm 2 of activated charcoal.
Claim 5
Dependent Claim
30 words
A collar as claimed in claim 1, wherein the foamed absorbent layer is a flexible foam laminated to the backing strip and is of a thickness of about 1/8-3/8 inches.
Claim 6
Dependent Claim
19 words
The collar as claimed in claim 1, wherein the backing strip is a fabric pretreated with liquid repellent agent.
Claim 7
Dependent Claim
16 words
A collar as claimed in claim 1, wherein the outer covering is a wide-mesh nylon fabric.
Claim 8
Dependent Claim
28 words
A collar as claimed in claim 1, wherein the resin foam has a porosity expressed as 1.7 ounces per square yard foam weight and 100-110 cells per inch.
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) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |