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Patent US3742623A successfully refreshed from Google Patents.
US3742623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boot with heel protection
Assignee: SERVUS RUBBER COMPANY Inc
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Filing: 1972-05-12
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Granted: 1973-07-03
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Expires: 1992-05-12
Abstract
Abstract A rubber or like plastic boot having a felt lining is provided at the lower heel area with a permanently bonded wear element insert which is preferably nylon fabric having a rubber backing fused into the felt surface at the heel area.
Inventors
- 👤 H Groothaert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:30
CPC Classifications
A; A43; A43B; A43B3/00; A43B3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
The boot defined in claim 1, wherein said wear element is a sheet of nylon fabric.
Claim 2
Dependent Claim
13 words
The boot defined in clAim 2, wherein its bonding material is fusible rubber.
References Cited (Backward Citations)
US2897610A
Cited
US2838854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |