US2558506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid flow control apparatus
Assignee: GROVE REGULATOR Co
•
Filing: 1949-01-28
•
Granted: 1951-06-26
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Expires: 1969-01-28
Abstract
No abstract record available.
Inventors
- 👤 Douglas H Annin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:57
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/03; F; F16; F16K; F16K31/00; F16K31/12; F16K31/122; F16K31/1221; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1484516A
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US2248322A
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US2382941A
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US2390445A
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US2411748A
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US2479454A
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 |