US2517832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for purifying fibrous suspensions
Assignee: Individual
•
Filing: 1946-01-10
•
Granted: 1950-08-08
•
Expires: 1966-01-10
Abstract
No abstract record available.
Inventors
- 👤 Blikstad Finn
- 👤 Pedersen Erling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:52
CPC Classifications
D; D21; D21D; D21D5/00; D21D5/02; D21D5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191000496A
Cited
US59510A
Cited
US2228852A
Cited
US703682A
Cited
DE659799C
Cited
US2144382A
Cited
DE703250C
Cited
US2406618A
Cited
US2338523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |