US3100732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of bleaching wood pulp by combined treatment with peroxide and an alkali metal borohydride
Assignee: EIDP Inc
•
Filing: 1959-10-05
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Granted: 1963-08-13
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Expires: 1979-10-05
Abstract
No abstract record available.
Inventors
- 👤 George E Smedberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:14
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/10; D21C9/1084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A METHOD OF BLEACHING WOOD PULP COMPRISING SUBJECTING THE PULP TO THE COMBINED AND SIMULTANEOUS ACTION OF PEROXIDE AND AN ALKALI METAL BOROHYDRIDE.
Claim 2
Independent Claim
23 words
A METHOD OF BLEACHING WOOD PULP COMPRISING SUBJECTING THE PULP TO THE COMBINED AND SIMULTANEOUS ACTION OF PEROXIDE AND AN ALKALI METAL BOROHYDRIDE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-12 | 1967-02-11 | 1967-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-12 | 1971-02-11 | 1971-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-12 | 1975-02-11 | 1975-08-13 | $7700.00 | Window Closed / Lapsed |