US1688604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust-heated oil vaporizer
Assignee: Individual
•
Filing: 1924-02-15
•
Granted: 1928-10-23
•
Expires: 1944-02-15
Abstract
No abstract record available.
Inventors
- 👤 George R Welch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:55
CPC Classifications
F; F02; F02M; F02M31/00; F02M31/02; F02M31/04; F02M31/045; F02M31/047; F02M31/06; F02M31/08; F02M31/087; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S261/00; Y10S261/45
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) | 1931-10-23 | 1932-04-23 | 1932-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-10-23 | 1936-04-23 | 1936-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-10-23 | 1940-04-23 | 1940-10-23 | $7700.00 | Window Closed / Lapsed |