US4564966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Construction for an athletic shoe and process of making
Assignee: CONTAX SPORTS Inc 1437 N CAROLAN AVE BURLINGAME CA 94010 A CORP OF
•
Filing: 1983-12-30
•
Granted: 1986-01-21
•
Expires: 2003-12-30
Abstract
Abstract A process and configuration for constructing the lower part of a spikeless type athletic shoe having molded studs on its undersurface to improve its wear-resistance is disclosed wherein portions of the sole and heel are premolded of an extra-durable material, such as high carbon content rubber, and then disposed partly cured in the shoe master mold at selected locations for molding and curing with the remainder of the sole and heel to produce a lower construction of conventional rubber molded with underface portions of extra-durability at the selected areas of greatest wear.
Inventors
- 👤 York Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:39
CPC Classifications
A; A43; A43B; A43B1/00; A43B1/0027; A43B13/00; A43B13/02; A43B13/04; A43B13/14; A43B13/16; A43B13/22; A43B13/223; A43B13/24; A43B13/26
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
140 words
A process for producing a lower for footwear, such as a sole for an athletic shoe, comprising the steps of: premolding and partly curing a portion of the lower of a relatively wear-resistant material; disposing said premolded partly cured portion in a master mold including a form of the lower at a location with respect to the remaining portions of the lower that is normally subjected to a greater degree of wear; partly surrounding said premolded portion with a material of less wear resistance in a master mold to form the remaining portion of the lower; and completing curing so as to mold all of the portions into a composite lower of integral construction with an area of its undersurface of at least one relatively wear-resistant portion at a location normally subjected to a greater degree of wear and use.
Claim 2
Dependent Claim
140 words
A process for producing a lower for footwear, such as a sole for an athletic shoe, comprising the steps of: premolding and partly curing a portion of the lower of a relatively wear-resistant material; disposing said premolded partly cured portion in a master mold including a form of the lower at a location with respect to the remaining portions of the lower that is normally subjected to a greater degree of wear; partly surrounding said premolded portion with a material of less wear resistance in a master mold to form the remaining portion of the lower; and completing curing so as to mold all of the portions into a composite lower of integral construction with an area of its undersurface of at least one relatively wear-resistant portion at a location normally subjected to a greater degree of wear and use.
Claim 3
Dependent Claim
15 words
A process as in claim 1, wherein said remaining portion and wear-resistant portion are rubber.
Claim 4
Dependent Claim
19 words
A process as in claim 3, wherein said wear-resistant portion has a higher carbon content than the remaining portion.
Claim 5
Dependent Claim
25 words
A process as in claim 1 wherein the lower comprises a sole and said premolded portion is located substantially in the middle of the sole.
Claim 6
Dependent Claim
24 words
A process as in claim 1 wherein the lower comprises a heel and said premolded portion is located along one edge of said heel.
Claim 7
Dependent Claim
24 words
A process as in claim 1 wherein the lower comprises a heel and said premolded portion is located along the rear of said heel.
Claim 8
Dependent Claim
15 words
A process as in claim 1 wherein said premolded portin comprises a plurality of studs.
Claim 9
Dependent Claim
19 words
A process as in claim 1 wherein the lower is formed on its undersurface with a plurality of studs.
Claim 10
Dependent Claim
11 words
A lower for footwear produced by the process of claim 1.
Claim 11
Dependent Claim
16 words
The lower for footwear of claim 9 wherein said remaining portion and wear-resistant portion are rubber.
Claim 12
Dependent Claim
20 words
The lower for footwear of claim 9 wherein said wear-resistant portion has a higher carbon content than the remaining portion.
Claim 13
Dependent Claim
26 words
The lower for footwear of claim 9 wherein the lower comprises a sole and said premolded portion is located substantially in the middle of the sole.
Claim 14
Dependent Claim
25 words
The lower for footwear of claim 9 wherein the lower comprises a heel, and said premolded portion is located along one edge of said heel.
Claim 15
Dependent Claim
25 words
The lower for footwear of claim 9 wherein the lower comprises a heel and said premolded portion is located along the rear of said heel.
Claim 16
Dependent Claim
16 words
The lower for footwear of claim 9 wherein said premolded portion comprises a plurality of studs.
References Cited (Backward Citations)
CA870873A
Cited
CA395892A
Cited
CA792977A
Cited
CA379125A
Cited
US3246068A
Cited
US3305895A
Cited
FR1593943A
Cited
US3522340A
Cited
CA1027356A
Cited
US3952429A
Cited
US4231169A
Cited
US4309376A
Cited
US4455765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |