US2428045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid treating apparatus
Assignee: Cornell Research Foundation Inc
•
Filing: 1942-04-21
•
Granted: 1947-09-30
•
Expires: 1962-04-21
Abstract
No abstract record available.
Inventors
- 👤 Paul F Sharp
- 👤 David B Hand
- 👤 Edward S Guthrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:16
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/0063; A; A01; A01J; A01J11/00; A01J11/04; A23; A23L; A23L2/00; A23L2/70; A23L2/76; B01D19/0042; B01D19/0047; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3084; Y10T137/309; Y10T137/3093; Y10T137/7287; Y10T137/7358; Y10T137/7423; Y10T137/7426; Y10T137/7436; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86734
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1041273A
Cited
US43951A
Cited
US1243258A
Cited
US1163734A
Cited
US1395981A
Cited
US1522982A
Cited
US1416215A
Cited
US1447445A
Cited
US1598787A
Cited
US1523773A
Cited
US1749561A
Cited
US1535721A
Cited
US1589224A
Cited
US1943536A
Cited
GB297964A
Cited
US1801178A
Cited
US1880903A
Cited
US1920062A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-29 | 1951-03-31 | 1951-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-29 | 1955-03-31 | 1955-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-29 | 1959-03-31 | 1959-09-30 | $7700.00 | Window Closed / Lapsed |