US1538558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulating valve
Assignee: American Schaeffer & Budenberg
•
Filing: 1922-12-07
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Granted: 1925-05-19
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Expires: 1942-12-07
Abstract
No abstract record available.
Inventors
- 👤 Ileman Emil August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:56
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/12; G05D23/125; G05D23/126; Y; Y10; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939; Y10T137/1963; Y10T137/1987; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7796
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) | 1928-05-18 | 1928-11-17 | 1929-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-05-18 | 1932-11-17 | 1933-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-05-18 | 1936-11-17 | 1937-05-19 | $7700.00 | Window Closed / Lapsed |