US3450152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure operated proportioning transmitter and controller
Assignee: ACROLAB INSTR CO
•
Filing: 1967-02-20
•
Granted: 1969-06-17
•
Expires: 1987-02-20
Abstract
No abstract record available.
Inventors
- 👤 Phillip E Ouellette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:40
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15C; F15C3/00; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7368; Y10T137/7371; Y10T137/7374; Y10T137/7439; Y10T137/7446
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US412013A
Cited
US1208274A
Cited
US2060723A
Cited
US2339469A
Cited
US3075551A
Cited
US2944562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |