US2620815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve actuated by fusible plug
Assignee: Individual
•
Filing: 1950-08-01
•
Granted: 1952-12-09
•
Expires: 1970-08-01
Abstract
No abstract record available.
Inventors
- 👤 Harry J Margraf
- 👤 Jr William F Macglashan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:07
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/40; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1782; Y10T137/1797
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |