Patent US3434797A successfully refreshed from Google Patents.
US3434797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treatment of hydrochloric acid waste pickle liquor
Assignee: Interlake Steel Corp
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Filing: 1967-07-27
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Granted: 1969-03-25
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Expires: 1987-07-27
Abstract
No abstract record available.
Inventors
- 👤 Robert A Taylor
- 👤 Frederick G Krikau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:48
CPC Classifications
C; C01; C01G; C01G49/00; C01G49/02; C01G49/08; Y; Y10; Y10S; Y10S423/00; Y10S423/01
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) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |