US2558247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow control fitting
Assignee: PAUL A DEWHIRST
•
Filing: 1948-07-26
•
Granted: 1951-06-26
•
Expires: 1968-07-26
Abstract
No abstract record available.
Inventors
- 👤 Leland S Hamer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:02
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/30; F16K3/312; Y; Y10; Y10S; Y10S285/00; Y10S285/912
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1931797A
Cited
US1938460A
Cited
US1599168A
Cited
US2030458A
Cited
US2214959A
Cited
US2270019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |