US3411534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Four-way valve
Assignee: Bankers Trust Co
•
Filing: 1966-12-28
•
Granted: 1968-11-19
•
Expires: 1986-12-28
Abstract
No abstract record available.
Inventors
- 👤 Frank L Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:17
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/22; A61M39/28; F; F16; F16K; F16K11/00; F16K11/02; F16K11/022; F16K11/027; F16K7/00; F16K7/02; F16K7/04; F16K7/06; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87153; Y10T137/87161
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US485698A
Cited
US2313550A
Cited
US2556689A
Cited
AT164691B
Cited
US2645245A
Cited
US2985192A
Cited
US3299904A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |