Patent US2178564A successfully refreshed from Google Patents.
Patent US2227770A successfully refreshed from Google Patents.
US2227770A
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Composite glass and ceramic article
Assignee: Steatit Magnesia AG
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Filing: 1936-12-10
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Granted: 1941-01-07
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Expires: 1956-12-10
Abstract
No abstract record available.
Inventors
- 👤 Ungewiss Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:26
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/04; C04B37/042; C04B33/00; C04B33/02; C04B35/00; C04B35/01; C04B35/16; C04B35/20; C04B35/44; C04B35/443; C04B38/00; C04B38/007; C04B38/0074; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206; C04B2235/3208; C04B2235/3215; C04B2235/3217; C04B2235/3222; C04B2235/34; C04B2235/3418; C04B2235/349; C04B2235/70; C04B2235/80; C04B2235/96; C04B2235/9607; C04B2237/00; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/341; C04B2237/343; C04B2237/50; C04B2237/61; C04B2237/64; Y; Y10; Y10S; Y10S106/00; Y10S106/04; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24521; Y10T428/24545; Y10T428/24612; Y10T428/2462; Y10T428/249921; Y10T428/249953; Y10T428/24996; Y10T428/249967; Y10T428/249969
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) | 1944-01-07 | 1944-07-08 | 1945-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-01-07 | 1948-07-08 | 1949-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-01-07 | 1952-07-08 | 1953-01-07 | $7700.00 | Window Closed / Lapsed |