US2072816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve for aerating liquid vessels
Assignee: WALTER KIDDE SALES Co
•
Filing: 1935-07-05
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Granted: 1937-03-02
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Expires: 1955-07-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Valentine J Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:20
CPC Classifications
B; B67; B67D; B67D1/00; B67D1/04; B67D1/0412; Y; Y10; Y10S; Y10S239/00; Y10S239/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-03-01 | 1940-08-31 | 1941-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-03-01 | 1944-08-31 | 1945-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-03-01 | 1948-08-31 | 1949-03-02 | $7700.00 | Window Closed / Lapsed |