US1488504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making insulating material
Assignee: Westinghouse Electric Corp
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Filing: 1919-08-08
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Granted: 1924-04-01
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Expires: 1939-08-08
Abstract
No abstract record available.
Inventors
- 👤 John J Keyes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:52
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/22; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1016; Y10T156/1018; Y10T156/1043; Y10T156/1044
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) | 1927-04-01 | 1927-10-01 | 1928-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-04-01 | 1931-10-01 | 1932-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-04-01 | 1935-10-01 | 1936-04-01 | $7700.00 | Window Closed / Lapsed |