Patent US2488770A successfully refreshed from Google Patents.
US2488770A
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Cover locking and actuating means for fluid control devices
Assignee: Detroit Lubricator Co
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Filing: 1944-09-29
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Granted: 1949-11-22
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Expires: 1964-09-29
Abstract
No abstract record available.
Inventors
- 👤 Andrew K Foulds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:40
CPC Classifications
F; F23; F23K; F23K5/00; F23K5/02; F23K5/14; F23K5/18; Y; Y10; Y10T; Y10T137/00; Y10T137/8376
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-21 | 1953-05-23 | 1953-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-21 | 1957-05-23 | 1957-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-21 | 1961-05-23 | 1961-11-22 | $7700.00 | Window Closed / Lapsed |