Patent US5215092A successfully refreshed from Google Patents.
US2468328A
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Assignee: Individual
•
Filing: 1944-02-08
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Granted: 1949-04-26
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Expires: 1964-02-08
Abstract
No abstract record available.
Inventors
- 👤 Rolo D Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:40
CPC Classifications
B; B01; B01D; B01D27/00; B01D27/02; B01D27/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2131004A
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US2144781A
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US2248131A
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US2247377A
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US2437082A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-25 | 1952-10-25 | 1953-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-25 | 1956-10-25 | 1957-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-25 | 1960-10-25 | 1961-04-26 | $7700.00 | Window Closed / Lapsed |