US2777458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure reducer
Assignee: Specialties Development Corp
•
Filing: 1954-08-30
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Granted: 1957-01-15
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Expires: 1974-08-30
Abstract
No abstract record available.
Inventors
- 👤 George T Stern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:39
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/10; G05D16/107; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2607; Y10T137/261; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7792; Y10T137/7793; Y10T137/7801
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1210891A
Cited
GB655579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |