US2522975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1946-02-23
•
Granted: 1950-09-19
•
Expires: 1966-02-23
Abstract
No abstract record available.
Inventors
- 👤 Layson W Voorhees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:41
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D35/147; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D2201/00; B01D2201/24; Y; Y10; Y10S; Y10S277/00; Y10S277/918
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US606218A
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US1615071A
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US2203495A
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US2168125A
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US2223701A
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US2275481A
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US2294262A
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US2354270A
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US2364617A
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US2348651A
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US2420414A
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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) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |