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US3453174A
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US
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Pulping and bleaching process wherein effluent liquor from alkaline extraction of bleached pulp is used to dissolve smelt
Assignee: Hooker Chemical Corp
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Filing: 1966-01-24
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Granted: 1969-07-01
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Expires: 1986-01-24
Abstract
No abstract record available.
Inventors
- 👤 William Howard Rapson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:29
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/12; D21C11/122; Y; Y02; Y02P; Y02P40/00; Y02P40/40; Y10; Y10S; Y10S162/00; Y10S162/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3269941A
Cited
US3366534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |