Patent US2734636A successfully refreshed from Google Patents.
US2734636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
foster
Assignee: —
•
Filing: —
•
Granted: 1956-02-14
•
Expires: 1973-02-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:36
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D35/147; F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/0466; F16K17/0493; F16K15/00; F16K15/14; F16K15/141; F16K15/142; Y; Y10; Y10S; Y10S210/00; Y10S210/17
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1326445A
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US1366151A
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US1473562A
Cited
US1938218A
Cited
US2250299A
Cited
US2294330A
Cited
US2191611A
Cited
US2287344A
Cited
US2313284A
Cited
US2321236A
Cited
US2412232A
Cited
US2533266A
Cited
US2557557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-13 | 1959-08-15 | 1960-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-13 | 1963-08-15 | 1964-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-13 | 1967-08-15 | 1968-02-14 | $7700.00 | Window Closed / Lapsed |