US2890840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screen panel for rotary-knife cutter machines
Assignee: Wyandotte Chemicals Corp
•
Filing: 1956-06-15
•
Granted: 1959-06-16
•
Expires: 1976-06-15
Abstract
No abstract record available.
Inventors
- 👤 Frederick L Fletcher
- 👤 Newlin S Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:39
CPC Classifications
B; B02; B02C; B02C18/00; B02C18/06; B02C18/16; B02C23/00; B02C23/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US699762A
Cited
US1457092A
Cited
US1666798A
Cited
US2088313A
Cited
US2274700A
Cited
US2360357A
Cited
US2545159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-15 | 1962-12-15 | 1963-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-15 | 1966-12-15 | 1967-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-15 | 1970-12-15 | 1971-06-16 | $7700.00 | Window Closed / Lapsed |