US3373104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cleaning filter tank
Assignee: Union Tank Car Co
•
Filing: 1964-12-17
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Granted: 1968-03-12
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Expires: 1984-12-17
Abstract
No abstract record available.
Inventors
- 👤 Leo F Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:35
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/62; B01D29/66; B01D29/11; B01D29/13; B01D29/15; B01D29/50; B01D29/52; B01D37/00; B01D37/02; B01J; B01J49/00; B01J49/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |