US2181074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat insulating panel
Assignee: ALFOL INSULATION Co Inc
•
Filing: 1939-05-27
•
Granted: 1939-11-21
•
Expires: 1959-05-27
Abstract
No abstract record available.
Inventors
- 👤 Roy J Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:12
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/78; E04B1/80; Y; Y10; Y10S; Y10S220/00; Y10S220/09; Y10T; Y10T428/00; Y10T428/23; Y10T428/234; Y10T428/236
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) | 1942-11-20 | 1943-05-22 | 1943-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-11-20 | 1947-05-22 | 1947-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-11-20 | 1951-05-22 | 1951-11-21 | $7700.00 | Window Closed / Lapsed |