US2801900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating spent sulfite liquor
Assignee: Marathon Corp
•
Filing: 1954-07-16
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Granted: 1957-08-06
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Expires: 1974-07-16
Abstract
No abstract record available.
Inventors
- 👤 Richard F Benning
- 👤 Martin A Baum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:34
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/0007; Y; Y10; Y10S; Y10S423/00; Y10S423/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
THE METHOD OF TREATING SPENT SULFITE LIQUOR WHICH COMPRISES THE STEPS OF ADDING 30 TO 50 P.P.M. SILICA SOL TO SAID LIQUOR, THEN ADDING LIME TO NEUTRALIZE THE LIQUOR
Claim 2
Independent Claim
29 words
THE METHOD OF TREATING SPENT SULFITE LIQUOR WHICH COMPRISES THE STEPS OF ADDING 30 TO 50 P.P.M. SILICA SOL TO SAID LIQUOR, THEN ADDING LIME TO NEUTRALIZE THE LIQUOR
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) | 1960-08-05 | 1961-02-04 | 1961-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-05 | 1965-02-04 | 1965-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-05 | 1969-02-04 | 1969-08-06 | $7700.00 | Window Closed / Lapsed |