US2614656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deaerating a suspension of papermaking stock
Assignee: ROTAREAED Corp
•
Filing: 1949-08-15
•
Granted: 1952-10-21
•
Expires: 1969-08-15
Abstract
No abstract record available.
Inventors
- 👤 Carleton L Clark
- 👤 Vicario Carlo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:58
CPC Classifications
D; D21; D21D; D21D5/00; D21D5/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1569105A
Cited
US1691458A
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US1853849A
Cited
US2001208A
Cited
DE682846C
Cited
US2201870A
Cited
US2571219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |