Patent US5170A successfully refreshed from Google Patents.
Patent US2156352A successfully refreshed from Google Patents.
US2156352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating device
Assignee: Individual
•
Filing: 1937-12-09
•
Granted: 1939-05-02
•
Expires: 1957-12-09
Abstract
No abstract record available.
Inventors
- 👤 Thomas F Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:40
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/34; C21D9/00; C21D9/52; C21D9/54; C21D9/56; Y; Y10; Y10S; Y10S264/00; Y10S264/46
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) | 1942-05-01 | 1942-10-31 | 1943-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-05-01 | 1946-10-31 | 1947-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-05-01 | 1950-10-31 | 1951-05-02 | $7700.00 | Window Closed / Lapsed |