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US3472382A
Expired / Lapsed
US
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Underdrain strainers
Assignee: Union Tank Car Co
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Filing: 1966-08-10
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Granted: 1969-10-14
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Expires: 1986-08-10
Abstract
No abstract record available.
Inventors
- 👤 Alfonse J Soriente
- 👤 Joseph H Duff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:50
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/0012; B01D21/0018; B01D21/02; B01D21/24; B01D21/245; B01D21/30; B01D21/302; B01D21/34; B01D24/00; B01D24/02; B01D24/10; B01D24/14; B01D24/46; B01D24/4631; B01D24/48; B01D24/4869
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) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |