Patent US2903301A successfully refreshed from Google Patents.
US2903301A
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US
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Method and apparatus for handling flour
Assignee: Fred D Pfening Co
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Filing: 1957-04-17
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Granted: 1959-09-08
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Expires: 1977-04-17
Abstract
No abstract record available.
Inventors
- 👤 Frederic D Pfening
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:39
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/04; B65G53/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |