US2978147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixer for granular material
Assignee: Simpson Herbert Corp
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Filing: 1957-12-23
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Granted: 1961-04-04
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Expires: 1977-12-23
Abstract
No abstract record available.
Inventors
- 👤 Robert L Mcilvaine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:32
CPC Classifications
B; B22; B22C; B22C5/00; B22C5/04; B22C5/0409; B22C5/0422; B22C5/0427; B02; B02C; B02C15/00; B02C15/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2603381A
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US2200825A
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US2303319A
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US2377307A
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US2471487A
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US2610802A
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US2652174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |