US2900077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for screening pulp
Assignee: William Kennedy & Sons Ltd
•
Filing: 1957-03-26
•
Granted: 1959-08-18
•
Expires: 1977-03-26
Abstract
No abstract record available.
Inventors
- 👤 Sandison Alexander Greswolde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:54
CPC Classifications
D; D21; D21D; D21D5/00; D21D5/02; D21D5/023; D21D5/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US122605A
Cited
US308844A
Cited
GB190118488A
Cited
US967345A
Cited
US1147239A
Cited
GB373199A
Cited
US2056310A
Cited
US2246669A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |