Patent US970901A successfully refreshed from Google Patents.
Patent US3267901A successfully refreshed from Google Patents.
US3267901A
Expired / Lapsed
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Grade indicator stake
Assignee: Individual
•
Filing: 1965-04-21
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Granted: 1966-08-23
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Expires: 1985-04-21
Abstract
No abstract record available.
Inventors
- 👤 Willard D Carroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:52
CPC Classifications
G; G01; G01C; G01C15/00; G01C15/02; G01C15/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A GRADE MARKER COMPRISING: (A) A STAKE ADAPTED TO BE DRIVEN INTO THE GROUND, AND (B) AT LEAST TWO READILY VISIBLE, STIFF, RESILIENT STRANDS ATTACHED TO THE TOP OF THE STAKE, (C) SAID STRANDS DIVERGENTLY EXTENDING UPWARD AND OUTWARD FROM A SINGLE AREA ON TOP THE STAKE; SO THAT WHEN THE MARKER IS DRIVEN INTO THE GROUND THE DISTANCE FROM THE PRESENT GRADE TO THE TOP OF THE STAKE IS INDICATED BY A MACHINE OPERATOR FROM AS FAR A DISTANCE AS MAY BE SEEN.
Claim 2
Dependent Claim
84 words
A GRADE MARKER COMPRISING: (A) A STAKE ADAPTED TO BE DRIVEN INTO THE GROUND, AND (B) AT LEAST TWO READILY VISIBLE, STIFF, RESILIENT STRANDS ATTACHED TO THE TOP OF THE STAKE, (C) SAID STRANDS DIVERGENTLY EXTENDING UPWARD AND OUTWARD FROM A SINGLE AREA ON TOP THE STAKE; SO THAT WHEN THE MARKER IS DRIVEN INTO THE GROUND THE DISTANCE FROM THE PRESENT GRADE TO THE TOP OF THE STAKE IS INDICATED BY A MACHINE OPERATOR FROM AS FAR A DISTANCE AS MAY BE SEEN.
References Cited (Backward Citations)
US2660822A
Cited
US3126861A
Cited
US885850A
Cited
US1066045A
Cited
US2654338A
Cited
US2753833A
Cited
US3059732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |