Patent US2416908A successfully refreshed from Google Patents.
US2416908A
Expired / Lapsed
US
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Heat-treating furnace
Assignee: Individual
•
Filing: 1943-05-01
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Granted: 1947-03-04
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Expires: 1963-05-01
Abstract
No abstract record available.
Inventors
- 👤 Yngve R Cornelius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:54
CPC Classifications
C; C04; C04B; C04B7/00; C04B7/36; C04B7/43; C04B11/00; C04B11/02; C04B11/028; C04B2/00; C04B2/10
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-03 | 1950-09-02 | 1951-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-03 | 1954-09-02 | 1955-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-03 | 1958-09-02 | 1959-03-04 | $7700.00 | Window Closed / Lapsed |