Patent US2898333A successfully refreshed from Google Patents.
US2898333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of treating cellulose
Assignee: Mo och Domsjo AB
•
Filing: 1957-10-21
•
Granted: 1959-08-04
•
Expires: 1977-10-21
Abstract
No abstract record available.
Inventors
- 👤 Jullander Elof Ingvar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:28
CPC Classifications
C; C08; C08B; C08B1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A METHOD OF IMPROVING CELLULOSE, WHICH COMPRISES REACTION CELLULOSE SUSPENDED IN AN AQUEOUS MEDIUM WITH AN ALKALI METAL BOROHYDRIDE IN THE PRESENCE OF A WATERSOLUBLE SALT OF A METAL IN THE GROUP CONSISTING OF LITHIUM, MAGNESIUM, CALCIUM, STRONTIUM AND BARIUM.
Claim 2
Independent Claim
40 words
A METHOD OF IMPROVING CELLULOSE, WHICH COMPRISES REACTION CELLULOSE SUSPENDED IN AN AQUEOUS MEDIUM WITH AN ALKALI METAL BOROHYDRIDE IN THE PRESENCE OF A WATERSOLUBLE SALT OF A METAL IN THE GROUP CONSISTING OF LITHIUM, MAGNESIUM, CALCIUM, STRONTIUM AND BARIUM.
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) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |