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US2508976A
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Assignee: Individual
•
Filing: 1948-05-28
•
Granted: 1950-05-23
•
Expires: 1968-05-28
Abstract
No abstract record available.
Inventors
- 👤 Sr Raymond G Tessmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:29
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D2201/00; B01D2201/18; B01D2201/182
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE98389C
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US612105A
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GB189913466A
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US1636177A
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US1716786A
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US1790036A
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FR672365A
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GB358526A
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US1965999A
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US2392354A
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US2435115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-22 | 1953-11-21 | 1954-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-22 | 1957-11-21 | 1958-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-22 | 1961-11-21 | 1962-05-23 | $7700.00 | Window Closed / Lapsed |