US2980033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid handling devices
Assignee: Individual
•
Filing: 1957-02-26
•
Granted: 1961-04-18
•
Expires: 1977-02-26
Abstract
No abstract record available.
Inventors
- 👤 Waddington Rogor Strange
- 👤 Duval Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:28
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/02; B05B7/04; B05B7/0408; B01; B01F; B01F25/00; B01F25/30; B01F25/31; B01F25/312; B01F35/00; B01F35/71; B01F35/712; B01F35/717; B01F35/718; B01F35/71805; B01F2101/00; B01F2101/48; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/2526
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1085348A
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US2353759A
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US2797132A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |