US3061504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing resin from wood pulp
Assignee: International Paper Canada Inc
•
Filing: 1960-03-21
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Granted: 1962-10-30
•
Expires: 1980-03-21
Abstract
No abstract record available.
Inventors
- 👤 Donald B Mutton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:47
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/08; Y; Y10; Y10S; Y10S162/00; Y10S162/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
IN A METHOD OF REMOVING RESIN FROM WOOD PULP, THE STEPS COMPRISING ADDING TO A WOOD PULP TREATED WITH CHLORINE DIOXIDE AN AQUEOUS SOLUTION OF AN IRON SALT, EXPOSING THE PULP TO THE ACTION OF A SOURCE OF FREE OXYGEN,
Claim 2
Dependent Claim
40 words
IN A METHOD OF REMOVING RESIN FROM WOOD PULP, THE STEPS COMPRISING ADDING TO A WOOD PULP TREATED WITH CHLORINE DIOXIDE AN AQUEOUS SOLUTION OF AN IRON SALT, EXPOSING THE PULP TO THE ACTION OF A SOURCE OF FREE OXYGEN,
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) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |