US2531479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow regulation valve
Assignee: Individual
•
Filing: 1944-12-22
•
Granted: 1950-11-28
•
Expires: 1964-12-22
Abstract
No abstract record available.
Inventors
- 👤 John A Southern
- 👤 Stephen B Bogese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:42
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/54; C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/44; C07D231/52; G; G05; G05D; G05D7/00; G05D7/01; G05D7/0146; Y; Y10; Y10S; Y10S251/00; Y10S251/903; Y10S261/00; Y10S261/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US19720A
Cited
US1716195A
Cited
US1718763A
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US1735182A
Cited
US1801959A
Cited
US1871287A
Cited
US1941453A
Cited
US2119250A
Cited
US2341394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |