US2189194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for heat treatment
Assignee: Wyeth Holdings LLC
•
Filing: 1938-12-22
•
Granted: 1940-02-06
•
Expires: 1958-12-22
Abstract
No abstract record available.
Inventors
- 👤 Brush John Goyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:24
CPC Classifications
C; C04; C04B; C04B11/00; C04B11/02; C04B11/028; C04B11/036
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) | 1943-02-05 | 1943-08-07 | 1944-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-02-05 | 1947-08-07 | 1948-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-02-05 | 1951-08-07 | 1952-02-06 | $7700.00 | Window Closed / Lapsed |