US4447969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boot for walking on soft materials
Assignee: Individual
•
Filing: 1982-02-12
•
Granted: 1984-05-15
•
Expires: 2002-02-12
Abstract
Abstract A boot or a boot add-on for walking on sand, mud, snow, marshes, or other soft material with moveable wings that open to increase the surface area which prevents sinking into the soft material.
Inventors
- 👤 James R. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:20
CPC Classifications
A; A43; A43B; A43B3/00; A43B3/0026; A43B5/00; A43B5/004; A43B5/04; A43B5/0415; A43B5/0417; A43B5/0419
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
52 words
A boot for walking on soft materials comprising: a. means for engaging and disengaging a boot or foot; b. an axle and/or stirrup; c. a lower bearing pin, a lower stop pin, a link, and an upper bearing block connecting the axle and/or stirrup to hinged wings; d. means to prevent fouling.
Claim 2
Dependent Claim
52 words
A boot for walking on soft materials comprising: a. means for engaging and disengaging a boot or foot; b. an axle and/or stirrup; c. a lower bearing pin, a lower stop pin, a link, and an upper bearing block connecting the axle and/or stirrup to hinged wings; d. means to prevent fouling.
Claim 3
Dependent Claim
27 words
A boot as claimed in claim 1 wherein the link further comprises: e. upper slot; f. upper bearing pin; g. lower slot; and h. lower bearing pin.
Claim 4
Dependent Claim
31 words
A boot as claimed in claim 1 wherein the upper bearing block further comprises: i. upper bearing pin; j. lower bearing pin; and k. means for attachment to the hinged wings.
Claim 5
Dependent Claim
42 words
A boot as claimed in claim 1 wherein the hinged wings further comprises: m. spring or elastic means for returning the wing assembly to a horizontal position; n. spring or elastic means for returning the wing assembly to a vertical retracted position.
References Cited (Backward Citations)
US3747236A
Cited
US3783532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |