US2050428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating wax
Assignee: Standard Oil Co
•
Filing: 1931-11-02
•
Granted: 1936-08-11
•
Expires: 1951-11-02
Abstract
No abstract record available.
Inventors
- 👤 Sterling H Diggs
- 👤 Robert E Beard
- 👤 Jr James M Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:14
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/34; C; C10; C10G; C10G73/00; C10G73/42
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) | 1939-08-11 | 1940-02-10 | 1940-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-08-11 | 1944-02-10 | 1944-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-08-11 | 1948-02-10 | 1948-08-11 | $7700.00 | Window Closed / Lapsed |