US3486732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual seating valve
Assignee: Robertshaw Controls Co
•
Filing: 1966-07-20
•
Granted: 1969-12-30
•
Expires: 1986-07-20
Abstract
No abstract record available.
Inventors
- 👤 Le Roy W Freeby
- 👤 Wilbur F Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:00
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/56; F16K31/566; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86928; Y10T137/86936; Y10T137/86944; Y10T137/86976
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2991012A
Cited
US2843323A
Cited
US3052264A
Cited
US3190314A
Cited
US3204921A
Cited
US3159346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |