US1955495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve structure
Assignee: Individual
•
Filing: 1930-08-06
•
Granted: 1934-04-17
•
Expires: 1950-08-06
Abstract
No abstract record available.
Inventors
- 👤 Frank W Hack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:34
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/18; F16K31/34; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7368; Y10T137/7371; Y10T137/7413; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764; Y10T137/7781; Y10T137/7793; Y10T137/7805
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1937-04-16 | 1937-10-16 | 1938-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-04-16 | 1941-10-16 | 1942-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-04-16 | 1945-10-16 | 1946-04-17 | $7700.00 | Window Closed / Lapsed |