US3529931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerating hci from iron chloride solutions
Assignee: NL Chemicals Inc
•
Filing: 1968-07-12
•
Granted: 1970-09-22
•
Expires: 1988-07-12
Abstract
No abstract record available.
Inventors
- 👤 Olav Moklebust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:33
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1204; C22B34/1213; C01; C01G; C01G49/00; C01G49/10; C22B1/00; C22B1/02; C22B1/08; C23; C23G; C23G1/00; C23G1/36; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S423/00; Y10S423/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3076692A
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US3310435A
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US3399964A
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US3443991A
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US3407033A
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US3440009A
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US3446590A
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US3457037A
Cited
US3442608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |