Patent US2729236A successfully refreshed from Google Patents.
US2729236A
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Regulator and diaphragm
Assignee: Weatherhead Co
•
Filing: 1951-08-31
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Granted: 1956-01-03
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Expires: 1971-08-31
Abstract
No abstract record available.
Inventors
- 👤 Louis J Valince
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:36
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0675; G05D16/0683; F; F15; F15C; F15C3/00; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2607; Y10T137/261; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7822; Y10T137/783
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US334714A
Cited
US957347A
Cited
US1859089A
Cited
US2038013A
Cited
US2517745A
Cited
US2564693A
Cited
US2545857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |