US2205534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite cellular glass block
Assignee: PPG Industries Inc
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Filing: 1938-06-04
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Granted: 1940-06-25
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Expires: 1958-06-04
Abstract
No abstract record available.
Inventors
- 👤 William O Lytle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:43
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/26; E04C2/284; E04C2/296; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24562; Y10T428/249921; Y10T428/249953; Y10T428/249967; Y10T428/249969; Y10T428/249982; Y10T428/249985; Y10T428/249987; Y10T428/24999; Y10T428/249991; Y10T428/249992
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) | 1943-06-25 | 1943-12-25 | 1944-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-06-25 | 1947-12-25 | 1948-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-06-25 | 1951-12-25 | 1952-06-25 | $7700.00 | Window Closed / Lapsed |