Patent US2715964A successfully refreshed from Google Patents.
US2715964A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1951-06-23
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Granted: 1955-08-23
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Expires: 1971-06-23
Abstract
No abstract record available.
Inventors
- 👤 Warren S Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:17
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/02; B01D24/20; B01D24/205; B01D24/26; B01D24/46; B01D24/4605; B01D24/461; B01D24/4668; B01D24/4673; B01D24/4684; B01D24/4689
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2228852A
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US659916A
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US845744A
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US1045830A
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US1007929A
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US1554129A
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US1830515A
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US2136400A
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US2195415A
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US2224191A
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US2280930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-22 | 1959-02-21 | 1959-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-22 | 1963-02-21 | 1963-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-22 | 1967-02-21 | 1967-08-23 | $7700.00 | Window Closed / Lapsed |