Patent US3309799A successfully refreshed from Google Patents.
US3309799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Levelling scraper for a trench tractor
Assignee: Individual
•
Filing: 1963-11-12
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Granted: 1967-03-21
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Expires: 1983-11-12
Abstract
No abstract record available.
Inventors
- 👤 Franklin C Kinkade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:12
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/02; E02F5/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A SCRAPER BLADE IMPLEMENT FOR A TRACTOR HAVING A FRAME AND A PAIR OF LATERALLY SPACED DRIVE UNITS COMPRISING: (A) A FIRST DOUBLE ACTING FLUID MOTOR MEANS HAVING A FORWARDLY PROJECTED HORIZONTALLY EXTENDED MEMBER DRIVABLE IN OPPOSITE DIRECTIONS, (B) MEANS MOUNTING THE FIRST FLUID MOTOR MEANS ON THE FRAME BETWEEN THE SPACED DRIVE UNITS FOR VERTICAL MOVEMENT RELATIVE TO THE FRAME WITH SAID PROJECTED MEMBER HORIZONTALLY EXTENDED LONGITUDINALLY OF THE FRAME, (C) A SECOND FLUID MOTOR MEANS CONNECTED TO THE MOUNTING MEANS AND TO THE FRAME OPERABLE TO VERTICALLY MOVE THE MOUNTING MEANS AND FIRST FLUID MOTOR MEANS RELATIVE TO THE FRAME, AND (D) SCRAPER BLADE MEANS CONNECTED TO THE FORWARDLY PROJECTED MEMBER WHEREBY THE VERTICAL POSITION OF
Claim 2
Dependent Claim
118 words
A SCRAPER BLADE IMPLEMENT FOR A TRACTOR HAVING A FRAME AND A PAIR OF LATERALLY SPACED DRIVE UNITS COMPRISING: (A) A FIRST DOUBLE ACTING FLUID MOTOR MEANS HAVING A FORWARDLY PROJECTED HORIZONTALLY EXTENDED MEMBER DRIVABLE IN OPPOSITE DIRECTIONS, (B) MEANS MOUNTING THE FIRST FLUID MOTOR MEANS ON THE FRAME BETWEEN THE SPACED DRIVE UNITS FOR VERTICAL MOVEMENT RELATIVE TO THE FRAME WITH SAID PROJECTED MEMBER HORIZONTALLY EXTENDED LONGITUDINALLY OF THE FRAME, (C) A SECOND FLUID MOTOR MEANS CONNECTED TO THE MOUNTING MEANS AND TO THE FRAME OPERABLE TO VERTICALLY MOVE THE MOUNTING MEANS AND FIRST FLUID MOTOR MEANS RELATIVE TO THE FRAME, AND (D) SCRAPER BLADE MEANS CONNECTED TO THE FORWARDLY PROJECTED MEMBER WHEREBY THE VERTICAL POSITION OF
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-20 | 1970-09-19 | 1971-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-20 | 1974-09-19 | 1975-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-20 | 1978-09-19 | 1979-03-21 | $7700.00 | Window Closed / Lapsed |