US3373458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Step tool
Assignee: HAIVALA CONCRETE TOOLS Inc
•
Filing: 1966-10-21
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Granted: 1968-03-19
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Expires: 1986-10-21
Abstract
No abstract record available.
Inventors
- 👤 William S Haivala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:38
CPC Classifications
E; E04; E04G; E04G13/00; E04G13/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A STEP TOOL COMPRISING A FLAT V-SHAPED BLADE HAVING A HORIZONTAL LEG AND A VERTICAL LEG, A RESILIENT BAND CONNECTING THE LEGS, SAID VERTICAL LEG HAVING A REAR SURFACE SAID REAR SURFACE BEING FORMED WITH PARALLEL VERTICALLY SPACED HORIZONTAL GROOVES, AND A DOG ECCENTRICALLY PIVOTED UPON THE HORIZONTAL LEG AND ADAPTED TO BE FORCIBLY ENGAGED IN SELECTED GROOVES.
Claim 2
Dependent Claim
58 words
A STEP TOOL COMPRISING A FLAT V-SHAPED BLADE HAVING A HORIZONTAL LEG AND A VERTICAL LEG, A RESILIENT BAND CONNECTING THE LEGS, SAID VERTICAL LEG HAVING A REAR SURFACE SAID REAR SURFACE BEING FORMED WITH PARALLEL VERTICALLY SPACED HORIZONTAL GROOVES, AND A DOG ECCENTRICALLY PIVOTED UPON THE HORIZONTAL LEG AND ADAPTED TO BE FORCIBLY ENGAGED IN SELECTED GROOVES.
References Cited (Backward Citations)
US398781A
Cited
US515890A
Cited
US1370060A
Cited
US1383688A
Cited
US2178899A
Cited
US2595742A
Cited
US2701465A
Cited
US3241174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |