US2228401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separating mechanism
Assignee: SF Bowser and Co Inc
•
Filing: 1937-11-24
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Granted: 1941-01-14
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Expires: 1957-11-24
Abstract
No abstract record available.
Inventors
- 👤 Ralph B Pressler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:27
CPC Classifications
F; F16; F16K; F16K24/00; F16K24/04; F16K24/042; F16K24/048; B; B01; B01D; B01D19/00; B01D19/0042; B01D19/0052; B01D19/0057; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3084; Y10T137/309; Y10T137/3099
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-01-14 | 1944-07-15 | 1945-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-01-14 | 1948-07-15 | 1949-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-01-14 | 1952-07-15 | 1953-01-14 | $7700.00 | Window Closed / Lapsed |