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US3512640A
Expired / Lapsed
US
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Countercurrent solid-liquid contacting system
Assignee: Trane US Inc
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Filing: 1967-10-18
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Granted: 1970-05-19
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Expires: 1987-10-18
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Hellmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:28
CPC Classifications
B; B01; B01J; B01J47/00; B01J47/10; B01D; B01D11/00; B01D11/02; B01D11/0207; B01D11/0215; B01D11/0223; B01D24/00; B01D24/02; B01D24/10; B01D24/16; B01D24/38; B01D24/386; B01D24/40; B01D24/42; B01D24/44; B01D24/48; B01D15/00; B01D15/08; B01D15/10; B01D15/18; B01D15/1892; B01D24/28; B01D24/30
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) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |