Patent US2943016A successfully refreshed from Google Patents.
Patent US2185280A successfully refreshed from Google Patents.
US2185280A
Expired / Lapsed
US
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Method of producing an inorganic insulating material
Assignee: Westinghouse Electric Corp
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Filing: 1938-03-19
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Granted: 1940-01-02
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Expires: 1958-03-19
Abstract
No abstract record available.
Inventors
- 👤 Stuckardt Karl
- 👤 Reichmann Reinhold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:02
CPC Classifications
C; C03; C03C; C03C10/00; C03C10/16; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/18
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) | 1943-01-01 | 1943-07-03 | 1944-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-01-01 | 1947-07-03 | 1948-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-01-01 | 1951-07-03 | 1952-01-02 | $7700.00 | Window Closed / Lapsed |