US2528094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow-energy mixing tank
Assignee: Walker Process Equipment Inc
•
Filing: 1946-12-12
•
Granted: 1950-10-31
•
Expires: 1966-12-12
Abstract
No abstract record available.
Inventors
- 👤 Walker James Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:16
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5281; B; B01; B01F; B01F25/00; B01F25/10; B01F25/103; B01F25/40; B01F25/42; B01F25/43; B01F25/431; B01F25/4316; B01F33/00; B01F33/80; B01F33/82
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US489833A
Cited
DE522772C
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DE529512C
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US671075A
Cited
US1157092A
Cited
US1468226A
Cited
US1625306A
Cited
US1842877A
Cited
US1864947A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |