US2578590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety valve
Assignee: PERRAULT BROS
•
Filing: 1948-02-25
•
Granted: 1951-12-11
•
Expires: 1968-02-25
Abstract
No abstract record available.
Inventors
- 👤 Perrault Ainslie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:41
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/02; F16K27/0209; F16K27/0227; F16K27/0232; F16K15/00; F16K15/02; F16K15/03; F16K17/00; F16K17/02; F16K17/04; F16K2200/00; F16K2200/20; F16K2200/202; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7771; Y10T137/7772; Y10T137/7774; Y10T137/7776; Y10T137/7837; Y10T137/7838; Y10T137/7841; Y10T137/7847; Y10T137/785; Y10T137/7898; Y10T137/7901; Y10T137/7903; Y10T137/8593; Y10T137/86292
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US948404A
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US1044234A
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US1049123A
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US1200306A
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US1545995A
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US1752456A
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US2030458A
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DE608964C
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |