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Patent US3479008A successfully refreshed from Google Patents.
US3479008A
Expired / Lapsed
US
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Self-cleaning valve for vacuum milking system
Assignee: Zero Manufacturing Co
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Filing: 1967-06-07
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Granted: 1969-11-18
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Expires: 1987-06-07
Abstract
No abstract record available.
Inventors
- 👤 Lloyd P Duncan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:05
CPC Classifications
A; A01; A01J; A01J7/00; A01J7/02; A01J7/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US825345A
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US1377168A
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US2867238A
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US2695625A
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US2965354A
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US3029063A
Cited
US3291443A
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US3369791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |