US3209475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earth scraper
Assignee: Frank G Hough Co
•
Filing: 1962-04-05
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Granted: 1965-10-05
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Expires: 1982-04-05
Abstract
No abstract record available.
Inventors
- 👤 Salna Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:00
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/40; E02F3/402; E02F3/404; E02F3/76; E02F3/7609; E02F3/7618; E02F3/96; E02F3/962
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
128 words
IN A TRACTOR CARRIED EARTH SCRAPER, A SCRAPER FRAMED ADAPTED TO BE PIVOTALLY CONNECTED TO THE TRACTOR AND EXTEND FORWARDLY THEREOF, A REARWARD SCRAPER PORTION PIVOTALLY CONNECTED TO SAID SCRAPER FRAME, SAID REARWARD SCRAPER PROTION INCLUDING A REARWARD SCRAPER BLADE, A FORWARD SCRAPER PORTION PIVOTALLY CONNECTED TO SAID REARWARD SCRAPER PORTION, SAID FORWARD SCRAPER PORTION INCLUDING A FORWARD MOLDBOARD AND A FRWARD SCRAPER BLADE, AND MEANS FOR PIVOTING SAID SCRAPER PORTIONS INTO A SCRAPING POSITION IN WHICH SAID FORWARD SCRAPER PORTION IS ABOVE AND SPACED FROM SAID REARWARD SCRAPER BLADE AND SAID FORWARD SCRAPER BLADE IS AT THE LOWERMOST POINT OF SAID FORWARD SCRAPER PORTION, WHEREBY SAID FORWARD SCRAPER BLADE SCRAPES EARTH AT ONE LEVEL WHILE SAID REARWARD SCRAPER BLADE CONTEMPORANEOUSLY SCRAPES EARTH AT A SUBSTANTIALLY DEEPER LEVEL.
References Cited (Backward Citations)
US2812595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |