US3238647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient push dozer
Assignee: Caterpillar Inc
•
Filing: 1963-08-27
•
Granted: 1966-03-08
•
Expires: 1983-08-27
Abstract
No abstract record available.
Inventors
- 👤 James D Hall
- 👤 Thomas R Rehberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:35
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/815; E02F3/8157; B; B62; B62D; B62D49/00; B62D49/04; E02F3/7609; E02F3/7618
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A RESILIENT PUSH DOZER COMPRISING A BLADE SUPPORTED FORWARDLY OF A TRACTOR ON VERTICALLY SPACED PIVOTED SUBSTANTIALLY PARALLEL LINKS, THE UPPER LINKS BEING RIGID AND THE LOWER LINKS BEING RESILIENTLY COMPRESSIBLE, MEANS TO RAISE AND LOWER THE BLADE ABOUT THE PIVOTED PARALLEL CONNECTIONS, AND MEANS SELECTIVELY OPERABLE FROM THE DOZER OPERATOR''S STATION TO PREVENT COMPRESSION OF SAID RESILIENT LINKS.
Claim 2
Dependent Claim
59 words
A RESILIENT PUSH DOZER COMPRISING A BLADE SUPPORTED FORWARDLY OF A TRACTOR ON VERTICALLY SPACED PIVOTED SUBSTANTIALLY PARALLEL LINKS, THE UPPER LINKS BEING RIGID AND THE LOWER LINKS BEING RESILIENTLY COMPRESSIBLE, MEANS TO RAISE AND LOWER THE BLADE ABOUT THE PIVOTED PARALLEL CONNECTIONS, AND MEANS SELECTIVELY OPERABLE FROM THE DOZER OPERATOR''S STATION TO PREVENT COMPRESSION OF SAID RESILIENT LINKS.
References Cited (Backward Citations)
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US2230029A
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US2665902A
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US2722066A
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US2697289A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |