US3503591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing apparatus
Assignee: Valmet AB
•
Filing: 1968-02-02
•
Granted: 1970-03-31
•
Expires: 1988-02-02
Abstract
No abstract record available.
Inventors
- 👤 Karl Erik Bergstedt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:43
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/60; B01F27/71; B01F27/711; B01F27/7111
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1733244A
Cited
AT125227B
Cited
US2474592A
Cited
US3027243A
Cited
US3297305A
Cited
US3334868A
Cited
US3276753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-30 | 1973-09-29 | 1974-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-30 | 1977-09-29 | 1978-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-30 | 1981-09-29 | 1982-03-31 | $7700.00 | Window Closed / Lapsed |