Patent US5427092A successfully refreshed from Google Patents.
US2881801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilot-operated three-way valve
Assignee: Automatic Switch Co
•
Filing: 1956-04-19
•
Granted: 1959-04-14
•
Expires: 1976-04-19
Abstract
No abstract record available.
Inventors
- 👤 Robert F Mccormick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:21
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/0401; F15B13/0405; F15B13/042; F15B13/043; F15B13/0431; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/40; F16K31/402; F16K31/406; Y; Y10; Y10T; Y10T137/00; Y10T137/5109; Y10T137/5196; Y10T137/524
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US653187A
Cited
US1501331A
Cited
US2200824A
Cited
US2273924A
Cited
US2426065A
Cited
US2641281A
Cited
US2693814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |