US2918073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Demand valve
Assignee: Stephenson Corp
•
Filing: 1953-09-23
•
Granted: 1959-12-22
•
Expires: 1973-09-23
Abstract
No abstract record available.
Inventors
- 👤 Goodner Monroe Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:30
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/20; A61M16/201; A61M16/206; A61M16/207; Y; Y10; Y10S; Y10S137/00; Y10S137/908; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2607
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US316626A
Cited
US1173834A
Cited
US1490654A
Cited
US1504787A
Cited
GB422401A
Cited
FR885626A
Cited
US2596178A
Cited
US2747597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |