US2780281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of sulphite liquor
Assignee: HERBERT H CLARK
•
Filing: 1952-01-09
•
Granted: 1957-02-05
•
Expires: 1972-01-09
Abstract
No abstract record available.
Inventors
- 👤 Armin E Reinert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:46
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/0042; Y; Y10; Y10S; Y10S159/00; Y10S159/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US981860A
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US1273208A
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GB243982A
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US2009283A
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US1976204A
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US2312474A
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US2411152A
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US2471035A
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US2542041A
Cited
US2533125A
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US2556250A
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US2595852A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |