US1468172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil valve
Assignee: VAPO STOVE Co
•
Filing: 1922-02-07
•
Granted: 1923-09-18
•
Expires: 1942-02-07
Abstract
No abstract record available.
Inventors
- 👤 Frederick H Schulenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:14
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/52; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8225; Y10T137/8275
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) | 1926-09-17 | 1927-03-19 | 1927-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-09-17 | 1931-03-19 | 1931-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-09-17 | 1935-03-19 | 1935-09-18 | $7700.00 | Window Closed / Lapsed |