US3977034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for form fitting shoes and boots
Assignee: Northwest Podiatric Laboratories Inc
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Filing: 1975-03-21
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Granted: 1976-08-31
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Expires: 1995-03-21
Abstract
Abstract The method of form fitting shoes and boots of the instant invention is directed to the heating of the area of the foot gear which needs to be enlarged to accommodate the foot and simultaneously applying pressure from the inside of the foot gear to cause the heated portion of the foot gear to expand the desired amount. Pneumatically or hydraulically actuated cylinders are used within the foot gear to provide the required pressure and a number of different shoe contacting members are interchangeable to assist in shaping the expanded portion of the foot gear.
Inventors
- 👤 Dennis N. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:01
CPC Classifications
A; A43; A43D; A43D3/00; A43D3/08; A43B; A43B5/00; A43B5/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A method of locally shaping foot gear by outward expansion of a local portion of the foot gear including the step of inserting a fluid pressure expansible member into the foot gear with one movable end engaged against the area to be expanded and the opposite end engaged against a portion of the foot gear opposite the area to be expanded, applying heat to the outer surface only of the area to be expanded, applying fluid pressure to the expansible member to expand the area to be expanded and permitting the foot gear to cool while maintaining the expansion of the expansible member.
Claim 2
Independent Claim
103 words
A method of locally shaping foot gear by outward expansion of a local portion of the foot gear including the step of inserting a fluid pressure expansible member into the foot gear with one movable end engaged against the area to be expanded and the opposite end engaged against a portion of the foot gear opposite the area to be expanded, applying heat to the outer surface only of the area to be expanded, applying fluid pressure to the expansible member to expand the area to be expanded and permitting the foot gear to cool while maintaining the expansion of the expansible member.
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) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |