US2990971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety closure cap for filling spouts of pressurized liquid cooling systems
Assignee: Individual
•
Filing: 1959-04-06
•
Granted: 1961-07-04
•
Expires: 1979-04-06
Abstract
No abstract record available.
Inventors
- 👤 Milton J Enell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:12
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/18; F16K17/19; F01; F01P; F01P11/00; F01P11/02; F01P11/0204; F01P11/0209; F01P11/0247; F01P11/0238; F01P2011/0252; Y; Y10; Y10S; Y10S220/00; Y10S220/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1079359A
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US1273347A
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US1473408A
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US2191975A
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US2227323A
Cited
US2360338A
Cited
US2619254A
Cited
US2528791A
Cited
US2591562A
Cited
US2792964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |