US2859773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual bore valve
Assignee: GEORGE A BUTLER
•
Filing: 1955-09-16
•
Granted: 1958-11-11
•
Expires: 1975-09-16
Abstract
No abstract record available.
Inventors
- 👤 James L Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:31
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/04; F16K27/044; E; E21; E21B; E21B34/00; E21B34/02; E21B43/00; E21B43/14; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4358; Y10T137/4372; Y10T137/8593; Y10T137/87153
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2335355A
Cited
US2653789A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |