US2465327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of ground wood pulp
Assignee: BUFFALO ELECTRO CHEM CO
•
Filing: 1947-08-01
•
Granted: 1949-03-22
•
Expires: 1967-08-01
Abstract
No abstract record available.
Inventors
- 👤 Robert L Mcewen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:01
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/10; D21C9/1057
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US848361A
Cited
US1768820A
Cited
US1953191A
Cited
US2147618A
Cited
US2187016A
Cited
US2359891A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-21 | 1952-09-20 | 1953-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-21 | 1956-09-20 | 1957-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-21 | 1960-09-20 | 1961-03-22 | $7700.00 | Window Closed / Lapsed |