US1557793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic regulator for turbo superchargers
Assignee: Individual
•
Filing: 1923-09-12
•
Granted: 1925-10-20
•
Expires: 1943-09-12
Abstract
No abstract record available.
Inventors
- 👤 Adolph L Berger
- 👤 Gregg David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:02
CPC Classifications
F; F02; F02B; F02B37/00; F02B37/12; F02B37/18; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
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) | 1928-10-19 | 1929-04-20 | 1929-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-10-19 | 1933-04-20 | 1933-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-10-19 | 1937-04-20 | 1937-10-20 | $7700.00 | Window Closed / Lapsed |