US2671469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced valve structure
Assignee: Individual
•
Filing: 1950-09-26
•
Granted: 1954-03-09
•
Expires: 1970-09-26
Abstract
No abstract record available.
Inventors
- 👤 Orson A Carnahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:27
CPC Classifications
A; A01; A01K; A01K7/00; A01K7/02; A01K7/04; F; F16; F16K; F16K39/00; F16K39/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7439; Y10T137/7446; Y10T137/7491
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US517575A
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US1173871A
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US1262641A
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US1630133A
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US1988545A
Cited
US2111836A
Cited
US2185267A
Cited
US2441220A
Cited
US2401237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |