US2601216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic air valve
Assignee: TACO HEATERS Inc
•
Filing: 1948-12-18
•
Granted: 1952-06-17
•
Expires: 1968-12-18
Abstract
No abstract record available.
Inventors
- 👤 John H White
- 👤 Rudolph T Schoerner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:29
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/08; F24D19/082; F24D19/083; F24D19/085; F24D19/087; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US867553A
Cited
US1846307A
Cited
US1915661A
Cited
US2153726A
Cited
US2314963A
Cited
US2331431A
Cited
US2467217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |