Patent US3394735A successfully refreshed from Google Patents.
US3394735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve member for a duplex strainer
Assignee: Andale Co
•
Filing: 1967-02-27
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Granted: 1968-07-30
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Expires: 1987-02-27
Abstract
No abstract record available.
Inventors
- 👤 Wurster Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:20
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/12; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86743; Y10T137/86751
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US236496A
Cited
US812232A
Cited
US1661675A
Cited
GB768429A
Cited
US2893681A
Cited
GB921912A
Cited
US3108779A
Cited
US3116755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |