Patent US3380437A successfully refreshed from Google Patents.
US3380437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transversely reciprocating fluidized bed development apparatus
Assignee: Xerox Corp
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Filing: 1966-07-21
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Granted: 1968-04-30
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Expires: 1986-07-21
Abstract
No abstract record available.
Inventors
- 👤 Karl J Swyler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:14
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3254625A
Cited
US3263234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |