US1849369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat insulating material
Assignee: DUROWOOD IND Inc
•
Filing: 1931-03-16
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Granted: 1932-03-15
•
Expires: 1951-03-16
Abstract
No abstract record available.
Inventors
- 👤 Meyrl M Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:12
CPC Classifications
F; F25; F25D; F25D23/00; F25D23/06; F25D2201/00; F25D2201/10; F25D2201/12; F25D2201/124; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/231
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) | 1935-03-15 | 1935-09-14 | 1936-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-03-15 | 1939-09-14 | 1940-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-03-15 | 1943-09-14 | 1944-03-15 | $7700.00 | Window Closed / Lapsed |