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US2895613A
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Assignee: Individual
•
Filing: 1955-03-17
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Granted: 1959-07-21
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Expires: 1975-03-17
Abstract
No abstract record available.
Inventors
- 👤 Edgar J Griffiths
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:54
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D35/147; B01D29/00; B01D29/01; B01D29/05; B01D29/055
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1496947A
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US1720475A
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US2280480A
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US2547797A
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FR1051660A
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US2727634A
Cited
US2709524A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |