US2881802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-way valve unit having rotary selector valve
Assignee: Individual
•
Filing: 1957-06-21
•
Granted: 1959-04-14
•
Expires: 1977-06-21
Abstract
No abstract record available.
Inventors
- 👤 Ivan L Crawford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:28
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/072; F16K11/076; F15; F15B; F15B13/00; F15B13/02; F15B13/06; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86638; Y10T137/86646; Y10T137/86654; Y10T137/86839; Y10T137/87265; Y10T137/87322; Y10T137/87378; Y10T137/87386
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US825370A
Cited
US1510129A
Cited
US2165096A
Cited
US2254341A
Cited
US2419481A
Cited
US2781056A
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 |