Patent US2931633A successfully refreshed from Google Patents.
US2931633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing apparatus
Assignee: Atlantic Research Corp
•
Filing: 1958-02-27
•
Granted: 1960-04-05
•
Expires: 1978-02-27
Abstract
No abstract record available.
Inventors
- 👤 Keith E Rumbel
- 👤 Earl D Hilburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:51
CPC Classifications
A; A47; A47J; A47J43/00; A47J43/04; B; B01; B01F; B01F27/00; B01F27/60; B01F27/70; B01F27/701; B01F27/703; B01F27/708; B01F35/00; B01F35/40
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US615683A
Cited
US1490617A
Cited
US1584562A
Cited
US2017116A
Cited
US2376593A
Cited
US2411006A
Cited
US2552166A
Cited
FR1030617A
Cited
US2702730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |