Patent US2420206A successfully refreshed from Google Patents.
US2420206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure and temperature relief valve
Assignee: Individual
•
Filing: 1944-10-07
•
Granted: 1947-05-06
•
Expires: 1964-10-07
Abstract
No abstract record available.
Inventors
- 👤 Smith Chetwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:10
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/003; G; G05; G05D; G05D23/00; G05D23/01; G05D23/12; G05D23/121; G05D23/122
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1229726A
Cited
US1574075A
Cited
US2035512A
Cited
US2099643A
Cited
US2223115A
Cited
US2305848A
Cited
US2389437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-05 | 1950-11-04 | 1951-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-05 | 1954-11-04 | 1955-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-05 | 1958-11-04 | 1959-05-06 | $7700.00 | Window Closed / Lapsed |