US3421740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material mixer
Assignee: Individual
•
Filing: 1966-10-31
•
Granted: 1969-01-14
•
Expires: 1986-10-31
Abstract
No abstract record available.
Inventors
- 👤 Norman A Behrens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:33
CPC Classifications
A; A01; A01D; A01D90/00; A01D90/10; A01D90/105; B; B01; B01F; B01F27/00; B01F27/60; B01F27/72; B01F27/726; B01F33/00; B01F33/50; B01F33/502; B01F27/05; B01F27/11; B01F27/114; B01F27/23; B01F27/232; B01F27/2322; Y; Y10; Y10S; Y10S366/00; Y10S366/603
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA673841A
Cited
US946475A
Cited
US1977515A
Cited
US2676002A
Cited
US2991870A
Cited
US2947524A
Cited
US3071352A
Cited
US3265227A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |