US2481959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a suspension of fibrous material
Assignee: Svenska Cellulosa AB
•
Filing: 1945-12-21
•
Granted: 1949-09-13
•
Expires: 1965-12-21
Abstract
No abstract record available.
Inventors
- 👤 Wahlin Bengt Gustaf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:47
CPC Classifications
D; D21; D21J; D21J1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1995540A
Cited
GB441441A
Cited
GB467359A
Cited
US2128311A
Cited
US2324605A
Cited
US2183561A
Cited
US2375833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-12 | 1953-03-14 | 1953-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-12 | 1957-03-14 | 1957-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-12 | 1961-03-14 | 1961-09-13 | $7700.00 | Window Closed / Lapsed |