US2602629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tamperproof valve
Assignee: Welsbach Corp
•
Filing: 1948-05-22
•
Granted: 1952-07-08
•
Expires: 1968-05-22
Abstract
No abstract record available.
Inventors
- 👤 Mcchesney Howard Hazen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:08
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US625954A
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US845134A
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GB191108479A
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US1283752A
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US1374621A
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FR587751A
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US1678459A
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US1753833A
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US1890357A
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US2410404A
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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) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |