Patent US1939306A successfully refreshed from Google Patents.
US1939306A
Expired / Lapsed
US
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Insulation
Assignee: Individual
•
Filing: 1929-08-02
•
Granted: 1933-12-12
•
Expires: 1949-08-02
Abstract
No abstract record available.
Inventors
- 👤 Frank R Leslie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:22
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/7654; Y; Y10; Y10S; Y10S52/00; Y10S52/09; Y10T; Y10T428/00; Y10T428/24; Y10T428/2419; Y10T428/24628; Y10T428/24653
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) | 1936-12-11 | 1937-06-12 | 1937-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-12-11 | 1941-06-12 | 1941-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-12-11 | 1945-06-12 | 1945-12-12 | $7700.00 | Window Closed / Lapsed |