Patent US1247990A successfully refreshed from Google Patents.
Patent US3410222A successfully refreshed from Google Patents.
US3410222A
Expired / Lapsed
US
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Slurry pump
Assignee: Pfaudler Inc
•
Filing: 1967-02-17
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Granted: 1968-11-12
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Expires: 1987-02-17
Abstract
No abstract record available.
Inventors
- 👤 Swanton Walter Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:59
CPC Classifications
F; F04; F04F; F04F1/00; F04F1/02; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US749563A
Cited
US3118391A
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US3123015A
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US775843A
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US1263287A
Cited
US3106170A
Cited
US3262396A
Cited
US3288081A
Cited
US3330218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-12 | 1972-05-13 | 1972-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-12 | 1976-05-13 | 1976-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-12 | 1980-05-13 | 1980-11-12 | $7700.00 | Window Closed / Lapsed |