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US2702050A
Expired / Lapsed
US
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Two-way by-pass header valve
Assignee: Individual
•
Filing: 1953-01-02
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Granted: 1955-02-15
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Expires: 1973-01-02
Abstract
No abstract record available.
Inventors
- 👤 Stephen J Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:01
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/08; F16K11/083; F16K31/00; F16K31/44; F16K31/52; F16K31/524; F16K31/52458; F16K31/52466; F16K31/60; F16K31/602; F16K35/00; F16K35/04; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86509; Y10T137/86517; Y10T137/86533; Y10T137/86541; Y10T137/86718; Y10T137/86743; Y10T137/86751; Y10T137/86863; Y10T137/86871
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-14 | 1958-08-16 | 1959-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-14 | 1962-08-16 | 1963-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-14 | 1966-08-16 | 1967-02-15 | $7700.00 | Window Closed / Lapsed |