US3526320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reverse osmosis-ion exchange water purification
Assignee: Union Tank Car Co
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Filing: 1968-01-18
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Granted: 1970-09-01
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Expires: 1988-01-18
Abstract
No abstract record available.
Inventors
- 👤 Benjamin H Kryzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:03
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/02; B01D61/08; C; C02; C02F; C02F9/00; C02F9/20; B01J; B01J39/00; B01J39/04; B01J39/05; C02F1/00; C02F1/44; C02F1/441; C02F2103/00; C02F2103/42
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) | 1973-08-31 | 1974-03-02 | 1974-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-31 | 1978-03-02 | 1978-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-31 | 1982-03-02 | 1982-09-01 | $7700.00 | Window Closed / Lapsed |