US2670755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined air vent valve and pressure relief plug
Assignee: Proctor Electric Co
•
Filing: 1949-09-09
•
Granted: 1954-03-02
•
Expires: 1969-09-09
Abstract
No abstract record available.
Inventors
- 👤 William S Kendrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:19
CPC Classifications
A; A47; A47J; A47J27/00; A47J27/08; A47J27/09; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7734; Y10T137/7837; Y10T137/7869; Y10T137/7871
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US360781A
Cited
US1313554A
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US701607A
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US2160398A
Cited
US2276502A
Cited
US2403691A
Cited
US2429149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |