US2998152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobile auger box for mixing, blending and distributing granular material
Assignee: Helix Corp
•
Filing: 1957-05-20
•
Granted: 1961-08-29
•
Expires: 1977-05-20
Abstract
No abstract record available.
Inventors
- 👤 Willis S Wognum
- 👤 Martin J Teibel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:01
CPC Classifications
A; A01; A01C; A01C15/00; A01C15/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2631760A
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US2673741A
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US2731248A
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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) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |