US1220530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intake-valve control.
Assignee: AUGUSTUS A SWAYZE
•
Filing: 1916-04-10
•
Granted: 1917-03-27
•
Expires: 1936-04-10
Abstract
No abstract record available.
Inventors
- 👤 John William Neal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:04
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/02; F01L1/04; F01L2305/00
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) | 1920-03-26 | 1920-09-25 | 1921-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-03-26 | 1924-09-25 | 1925-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-03-26 | 1928-09-25 | 1929-03-27 | $7700.00 | Window Closed / Lapsed |