Patent US2642950A successfully refreshed from Google Patents.
US2642950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deaerating a suspension of cellulosic fibers
Assignee: ROTAREAED Corp
•
Filing: 1951-11-30
•
Granted: 1953-06-23
•
Expires: 1971-11-30
Abstract
No abstract record available.
Inventors
- 👤 Carleton L Clark
- 👤 Vicario Carlo
- 👤 Cornelius J Lyons
- 👤 James A Smith
- 👤 William W Hickey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:04
CPC Classifications
D; D21; D21D; D21D5/00; D21D5/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US280905A
Cited
US474490A
Cited
US1396632A
Cited
US1883662A
Cited
US1910088A
Cited
US2201870A
Cited
US2247897A
Cited
US2346423A
Cited
US2484577A
Cited
US2614656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |