Patent US3350259A successfully refreshed from Google Patents.
US3350259A
Expired / Lapsed
US
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Purification of aqueous refuse liquids containing the ortho-hydroxyphenol moiety
Assignee: Northwest Magnesite Co
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Filing: 1964-12-21
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Granted: 1967-10-31
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Expires: 1984-12-21
Abstract
No abstract record available.
Inventors
- 👤 Herrick Ivan
- 👤 Mark F Adams
- 👤 Huffaker Ethan Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:14
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/28; C02F1/281; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/908; Y10S210/909; Y10S210/928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
THAT PROCESS OF REMOVING WATER-SOLUBLE COMPOUNDS FROM AQUEOUS STREAMS IN WHICH THEY ARE DISSOLVED, WHICH COMPOUNDS ARE SELECTED FROM THE GROUP CONSISTING ESSENTIALLY OF:
Claim 2
Dependent Claim
24 words
THAT PROCESS OF REMOVING WATER-SOLUBLE COMPOUNDS FROM AQUEOUS STREAMS IN WHICH THEY ARE DISSOLVED, WHICH COMPOUNDS ARE SELECTED FROM THE GROUP CONSISTING ESSENTIALLY OF:
References Cited (Backward Citations)
US2385955A
Cited
US2716589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |