US3581412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inner boot and method for forming the same
Assignee: Individual
•
Filing: 1971-02-04
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Granted: 1971-06-01
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Expires: 1991-02-04
Abstract
Abstract An inner boot which includes an outer liner, an inner liner connected to the outer liner and spaced apart therefrom to form a sealed compartment between the liners, and a resilient member positioned between the liners to mold the inner liner to the shape of an individual''s foot and the outer liner to the interior shape of an outer boot shell. The resilient member is formed by injecting a liquid resin elastomer reaction mixture under pressure into the compartment between the liners when an individual''s foot is positioned within the inner liner and when the inner boot is fitted in the outer boot shell and thereafter curing the resin elastomer reaction mixture.
Inventors
- 👤 Melvin W Dalebout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:42
CPC Classifications
A; A43; A43B; A43B19/00
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
96 words
An article of footwear which comprises an outer shell and an inner boot positioned within said outer shell, said inner boot having an inner liner sized to receive an individual''s foot; an outer liner positioned about said inner liner forming a compartment between said inner liner and said outer liner, and a resilient form member positioned in said compartment between said inner liner and said outer liner to position said inner liner substantially adjacent to and about said individual''s foot and to position said outer liner substantially adjacent to the inner sidewalls of said outer shell.
Claim 2
Dependent Claim
96 words
An article of footwear which comprises an outer shell and an inner boot positioned within said outer shell, said inner boot having an inner liner sized to receive an individual''s foot; an outer liner positioned about said inner liner forming a compartment between said inner liner and said outer liner, and a resilient form member positioned in said compartment between said inner liner and said outer liner to position said inner liner substantially adjacent to and about said individual''s foot and to position said outer liner substantially adjacent to the inner sidewalls of said outer shell.
Claim 3
Dependent Claim
19 words
The article of footwear of claim 1 wherein said resilient form member is formed from a resin elastomer material.
Claim 4
Dependent Claim
23 words
The article of footwear of claim 1 wherein said inner liner is sized to receive the foot and lower ankle of said individual.
Claim 5
Dependent Claim
16 words
The article of footwear of claim 2 wherein said resin elastomer material is a polyurethane resin.
Claim 6
Dependent Claim
40 words
The article of footwear of claim 1 wherein said inner liner of said inner boot comprises a closed cell foam sheet having a two-way stretch fabric bonded to the face of said sheet positioned adjacent said foot of said individual.
Claim 7
Dependent Claim
30 words
The article of footwear of said claim 3 wherein said inner liner and said outer liner of said inner boot surrounds the entire foot and lower ankle of said individual.
Claim 8
Independent Claim
152 words
A method for custom fitting an article of footwear to the foot of an individual which comprises providing an outer shell with an inner boot within said outer shell, said inner boot including an inner liner sized to receive the foot of said individual and an outer liner positioned about said inner liner forming a substantially closed compartment between said inner liner and said outer liner; injecting a liquid resin reaction mixture into said compartment when a form the shape of an individual''s foot is positioned within said inner liner of said inner boot until sufficient resin is present, when cured, to urge said inner liner substantially adjacent to and about said form of said individual''s foot and to urge said outer liner substantially against the interior sidewalls of said outer boot shell; and curing said resin reaction mixture while said form of said individual''s foot is positioned within said inner liner.
Claim 9
Independent Claim
152 words
A method for custom fitting an article of footwear to the foot of an individual which comprises providing an outer shell with an inner boot within said outer shell, said inner boot including an inner liner sized to receive the foot of said individual and an outer liner positioned about said inner liner forming a substantially closed compartment between said inner liner and said outer liner; injecting a liquid resin reaction mixture into said compartment when a form the shape of an individual''s foot is positioned within said inner liner of said inner boot until sufficient resin is present, when cured, to urge said inner liner substantially adjacent to and about said form of said individual''s foot and to urge said outer liner substantially against the interior sidewalls of said outer boot shell; and curing said resin reaction mixture while said form of said individual''s foot is positioned within said inner liner.
Claim 10
Dependent Claim
18 words
The method of claim 24 wherein the form the shape of said individual''s foot is said individual''s foot.
Claim 11
Dependent Claim
21 words
The method of claim 24 wherein said resin reaction mixture is aerated prior to injecting said reaction mixture iNto said compartment.
Claim 12
Dependent Claim
16 words
The method of claim 24 wherein said resin reaction mixture is a polyurethane resin reaction mixture.
Claim 13
Dependent Claim
24 words
The method of claim 25 wherein said resin reaction mixture is injected into said compartment through an elongated tube in communication with said compartment.
Claim 14
Dependent Claim
15 words
The method of claim 27 wherein said polyurethane resin reaction mixture contains a filler material.
Claim 15
Dependent Claim
47 words
The method of claim 25 wherein a toe covering is positioned over the toes of said individual''s foot when said foot is positioned within said inner liner of said inner boot to provide an enlarged area for the toes of said individual''s foot in said inner boot.
Claim 16
Dependent Claim
36 words
The method of claim 27 wherein said polyurethane resin reaction mixture is prepared prior to injecting said mixture into said compartment by mixing together separately packaged quantities of a polyisocyanate, a polyol and a curing catalyst.
Claim 17
Dependent Claim
28 words
The method of claim 31 wherein a filling material is mixed with said polyurethane resin reaction mixture prior to injecting said polyurethane resin reaction mixture into said compartment.
Claim 18
Dependent Claim
78 words
In combination with an outer shell, an inner boot adapted to be custom fit to the foot of an individual positioned within said outer shell, said inner boot comprising a flexible inner liner sized to receive the foot of said individual; an outer liner positioned about said inner liner and forming a substantially closed compartment between said inner liner and said outer liner; and filling means in communication with said compartment for injecting filling material into said compartment.
Claim 19
Dependent Claim
78 words
In combination with an outer shell, an inner boot adapted to be custom fit to the foot of an individual positioned within said outer shell, said inner boot comprising a flexible inner liner sized to receive the foot of said individual; an outer liner positioned about said inner liner and forming a substantially closed compartment between said inner liner and said outer liner; and filling means in communication with said compartment for injecting filling material into said compartment.
Claim 20
Dependent Claim
16 words
The combination of claim 16 wherein said inner liner and said outer liner are secured together.
Claim 21
Dependent Claim
21 words
The combination of claim 16 wherein said inner boot is sized to enclose the foot and lower ankle of said individual.
Claim 22
Dependent Claim
13 words
The combination of claim 17 wherein said filling means comprises an elongated tube.
Claim 23
Dependent Claim
36 words
The combination of claim 19 wherein said elongated tube is secured to the ankle cuff portion of said outer liner at a position above the top edge of the ankle cuff of the outer boot shell.
Claim 24
Dependent Claim
27 words
The combination of claim 18 wherein said inner liner and said outer liner of said inner boot surround the entire foot and lower ankle of said individual.
Claim 25
Dependent Claim
38 words
The combination of claim 16 wherein said inner liner of said inner boot comprises a closed cell foam sheet having a two-way stretch fabric bonded to the face of said sheet positioned adjacent said foot of said individual.
Claim 26
Dependent Claim
72 words
An inner boot for use within an outer shell and adapted to be custom fit to the foot of an individual which comprises a flexible inner liner sized to receive said foot of said individual; an outer liner positioned about said inner liner and forming a substantially closed compartment between said inner liner and said outer liner; and filling means in communication with said compartment for injecting filling material into said compartment.
Claim 27
Dependent Claim
72 words
An inner boot for use within an outer shell and adapted to be custom fit to the foot of an individual which comprises a flexible inner liner sized to receive said foot of said individual; an outer liner positioned about said inner liner and forming a substantially closed compartment between said inner liner and said outer liner; and filling means in communication with said compartment for injecting filling material into said compartment.
Claim 28
Dependent Claim
17 words
The inner boot of claim 23 wherein said inner liner and said outer liner are secured together.
Claim 29
Dependent Claim
22 words
The inner boot of claim 23 wherein said inner boot is sized to enclose the foot and lower ankle of said individual.
Claim 30
Dependent Claim
14 words
The inner boot of claim 24 wherein said filling means comprises an elongated tube.
Claim 31
Dependent Claim
39 words
The inner boot of claim 23 wherein said inner liner of said inner boot comprises a closed cell foam sheet having a two-way stretch fabric bonded to the face of said sheet positioned adjacent said foot of said individual.
Claim 32
Dependent Claim
28 words
The inner boot of claim 25 wherein said inner liner and said outer liner of said inner boot surround the entire foot and lower ankle of said individual.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |