US2664039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable tread earthworking implement with frame leveling means
Assignee: TOWNER Manufacturing Co
•
Filing: 1947-12-29
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Granted: 1953-12-29
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Expires: 1967-12-29
Abstract
No abstract record available.
Inventors
- 👤 Loyd E Heckathorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:54
CPC Classifications
A; A01; A01B; A01B63/00; A01B63/14; A01B63/24; A01B63/26; A01B63/16; A01B63/163
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1653677A
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US1653695A
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US1491579A
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US1677474A
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US1653678A
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US2050731A
Cited
US2160243A
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US2257650A
Cited
US2426529A
Cited
US2320742A
Cited
US2340497A
Cited
US2385950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |