US2844320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for proportioning different temperature fluids
Assignee: Robertshaw Controls Co
•
Filing: 1955-09-02
•
Granted: 1958-07-22
•
Expires: 1975-09-02
Abstract
No abstract record available.
Inventors
- 👤 Paul E Cate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:04
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/13; G05D23/1393; D; D06; D06F; D06F39/00; D06F39/08; D06F39/088; F; F16; F16K; F16K11/00; F16K11/10; F16K11/20; F16K11/24; F16K31/00; F16K31/02; F16K31/025
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1704943A
Cited
US1585451A
Cited
US2087024A
Cited
US2146930A
Cited
US2280667A
Cited
US2354364A
Cited
US2395007A
Cited
US2712324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |