US3437202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow channel for zigzag classifiers
Assignee: Alpine AG
•
Filing: 1967-04-04
•
Granted: 1969-04-08
•
Expires: 1987-04-04
Abstract
No abstract record available.
Inventors
- 👤 Fritz W Kaiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:28
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/62; B03B5/623
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US187193A
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US2743817A
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US1720861A
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GB380196A
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US2106027A
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US2258789A
Cited
US2279590A
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DE969075C
Cited
US2815858A
Cited
GB1014723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |