Patent US2772000A successfully refreshed from Google Patents.
US2772000A
Expired / Lapsed
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Leaf anchoring means
Assignee: Individual
•
Filing: 1953-03-30
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Granted: 1956-11-27
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Expires: 1973-03-30
Abstract
No abstract record available.
Inventors
- 👤 Charles E Hunziker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:49
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/39; B01D29/41; B01D29/62; B01D29/64; B01D29/6438; B01D29/6446; B01D29/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB384749A
Cited
US2073026A
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US1966274A
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US2207618A
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US2278453A
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US2583963A
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US2655265A
Cited
US2703177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |