US2535835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proportional flow valve
Assignee: MARION L J LAMBERT
•
Filing: 1946-10-30
•
Granted: 1950-12-26
•
Expires: 1966-10-30
Abstract
No abstract record available.
Inventors
- 👤 Archibald R Burgess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:15
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/58; B; B67; B67D; B67D1/00; B67D1/0042; B67D1/0081; B67D1/0082; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87153; Y10T137/87161
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |