US3433464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing apparatus
Assignee: DOYAL P DUKE
•
Filing: 1967-09-21
•
Granted: 1969-03-18
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Expires: 1987-09-21
Abstract
No abstract record available.
Inventors
- 👤 Kenneth L Swafford
- 👤 Doyal P Duke
- 👤 Roy E Hazelwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:01
CPC Classifications
A; A47; A47J; A47J31/00; A47J31/40; A47J31/401; A01; A01J; A01J13/00
Claims Analysis
Total Claims: 0
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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) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |