US2396235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preheater
Assignee: BLAZEL Corp
•
Filing: 1942-10-08
•
Granted: 1946-03-12
•
Expires: 1962-10-08
Abstract
No abstract record available.
Inventors
- 👤 Nathan A Arvins
- 👤 Abraham A Arvintz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:54
CPC Classifications
F; F23; F23K; F23K5/00; F23K5/02; F23K5/14; F23K5/20
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) | 1949-03-11 | 1949-09-10 | 1950-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-03-11 | 1953-09-10 | 1954-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-03-11 | 1957-09-10 | 1958-03-12 | $7700.00 | Window Closed / Lapsed |