US3443580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm valve mounted in a control knob
Assignee: Robertshaw Controls Co
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Filing: 1967-01-20
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Granted: 1969-05-13
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Expires: 1987-01-20
Abstract
No abstract record available.
Inventors
- 👤 Kenneth G Kreuter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:26
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0644; G05D16/0655; G05D16/0638; G05D16/0641; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/599; Y10T137/5994; Y10T137/7722; Y10T137/7781; Y10T137/7783; Y10T137/7835; Y10T137/7836
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |