US3489074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Food-treating device with helical pumping system
Assignee: United States Department of Agriculture
•
Filing: 1968-05-16
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Granted: 1970-01-13
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Expires: 1988-05-16
Abstract
No abstract record available.
Inventors
- 👤 Daniel F Farkas
- 👤 Melvin E Lazar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:46
CPC Classifications
A; A23; A23B; A23B2/00; A23B2/40; A23B2/42; A23B2/46; A23B2/465; A23B2/001; A23B2/20; A23B2/25; A23B2/425
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE442863C
Cited
US1114603A
Cited
US1859147A
Cited
US2590323A
Cited
US2549216A
Cited
US2507797A
Cited
US3092503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |