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Patent US2781913A successfully refreshed from Google Patents.
US2781913A
Expired / Lapsed
US
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Gas and liquid filter/separator
Assignee: Individual
•
Filing: 1955-01-21
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Granted: 1957-02-19
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Expires: 1975-01-21
Abstract
No abstract record available.
Inventors
- 👤 Malcolm W Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:49
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/31; B01D29/33; B01D29/50; B01D29/52; B01D29/54; Y; Y10; Y10S; Y10S210/00; Y10S210/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US388017A
Cited
US511757A
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US1663322A
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GB303961A
Cited
US2016161A
Cited
FR751730A
Cited
US2265550A
Cited
US2339703A
Cited
US2617986A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-19 | 1960-08-20 | 1961-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-19 | 1964-08-20 | 1965-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-19 | 1968-08-20 | 1969-02-19 | $7700.00 | Window Closed / Lapsed |