US2886178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter for dry cleaning solvent and vibrating means for backwashing same
Assignee: WARD IND CORP
•
Filing: 1952-07-28
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Granted: 1959-05-12
•
Expires: 1972-07-28
Abstract
No abstract record available.
Inventors
- 👤 Davis Ernest
- 👤 Russell D Mccallum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:01
CPC Classifications
D; D01; D01B; D01B3/00; D01B3/04; B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/50; B01D29/52; B01D29/62; B01D29/70; B01D29/72; B01D35/00; B01D35/20; B01D37/00; B01D37/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR429820A
Cited
US1144854A
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US1227982A
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US1634720A
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US1734999A
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US1644854A
Cited
US2044096A
Cited
US2366903A
Cited
US2650872A
Cited
US2578636A
Cited
US2555724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |