Patent US1986789A successfully refreshed from Google Patents.
US2285408A
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Assignee: Individual
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Filing: 1940-02-09
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Granted: 1942-06-09
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Expires: 1960-02-09
Abstract
No abstract record available.
Inventors
- 👤 Frederic D Blauvelt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:47
CPC Classifications
F; F21; F21S; F21S41/00; F21S41/40; F21S41/43; F21S41/20; F21S41/25; F21S41/265; F21S41/285; F21S41/30; F21S41/32; F21S41/33; F21S41/331; F21S41/36; F21S41/365; F21S41/60; F21S41/68; F21S41/683; F21S41/686; F21S41/10; F21S41/14; F21S41/162
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) | 1945-06-08 | 1945-12-08 | 1946-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-06-08 | 1949-12-08 | 1950-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-06-08 | 1953-12-08 | 1954-06-09 | $7700.00 | Window Closed / Lapsed |