Patent EP0299669A2 successfully refreshed from Google Patents.
US2550776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Papermaking machine flow box
Assignee: Rice Barton Corp
•
Filing: 1947-03-03
•
Granted: 1951-05-01
•
Expires: 1967-03-03
Abstract
No abstract record available.
Inventors
- 👤 Everett W Clem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:00
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/02; B; B01; B01F; B01F25/00; B01F25/40; B01F25/42; B01F25/421; B01F25/423; B01F25/4231
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1682460A
Cited
US1623157A
Cited
US1669307A
Cited
US1846406A
Cited
US1841702A
Cited
US2076991A
Cited
US2216817A
Cited
US2369608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |