Patent US1487709A successfully refreshed from Google Patents.
US1487709A
Expired / Lapsed
US
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Fuel economizer and smoke-prevention mechanism
Assignee: Individual
•
Filing: 1923-03-15
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Granted: 1924-03-25
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Expires: 1943-03-15
Abstract
No abstract record available.
Inventors
- 👤 Besser Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:24
CPC Classifications
F; F28; F28D; F28D21/00; F28D21/0001; F28D21/0003; F28D21/0005; F28D21/0008; Y; Y10; Y10S; Y10S165/00; Y10S165/901; Y10T; Y10T137/00; Y10T137/0971; Y10T137/108; Y10T137/1116
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) | 1927-03-25 | 1927-09-24 | 1928-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-03-25 | 1931-09-24 | 1932-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-03-25 | 1935-09-24 | 1936-03-25 | $7700.00 | Window Closed / Lapsed |