US2840933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination scraper and scarifier attachment for tractor
Assignee: Individual
•
Filing: 1953-11-12
•
Granted: 1958-07-01
•
Expires: 1973-11-12
Abstract
No abstract record available.
Inventors
- 👤 Jack W Brem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:05
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/7622; E02F3/7604; Y; Y10; Y10S; Y10S37/00; Y10S37/903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1829728A
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US1755631A
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US2052182A
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US2104675A
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US2284388A
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US2329831A
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US2348910A
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US2578131A
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US2642681A
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US2566562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |