US2997179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sifting device and method for filtering with the aid of said sifting device
Assignee: Individual
•
Filing: 1959-07-28
•
Granted: 1961-08-22
•
Expires: 1979-07-28
Abstract
No abstract record available.
Inventors
- 👤 Gooijer Gerrit De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:07
CPC Classifications
A; A24; A24B; A24B15/00; A24B15/10; A24B15/12; B; B01; B01D; B01D33/00; B01D33/04; B01D33/70; B01D33/74; B01D33/745; B01D33/747; B03; B03B; B03B4/00; B03B4/04; D; D21; D21F; D21F1/00; D21F1/48; D21F1/52
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |