US2091874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow bean indicator
Assignee: Hughes Tool Co
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Filing: 1936-05-21
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Granted: 1937-08-31
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Expires: 1956-05-21
Abstract
No abstract record available.
Inventors
- 👤 Neuhaus Ralph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:49
CPC Classifications
F; F16; F16K; F16K17/00; F16K1/00; F16K1/32; F16K1/34; F16K1/36; F16K1/38; Y; Y10; Y10S; Y10S137/00; Y10S137/903; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8225; Y10T137/8275
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) | 1940-08-30 | 1941-03-01 | 1941-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-08-30 | 1945-03-01 | 1945-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-08-30 | 1949-03-01 | 1949-08-31 | $7700.00 | Window Closed / Lapsed |