Patent US1934802A successfully refreshed from Google Patents.
US1934802A
Expired / Lapsed
US
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Moving picture screen and method of making it
Assignee: PPG Industries Inc
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Filing: 1930-02-11
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Granted: 1933-11-14
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Expires: 1950-02-11
Abstract
No abstract record available.
Inventors
- 👤 Halbert K Hitchcock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:47
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; B; B32; B32B; B32B17/00; B32B17/06; B32B17/08; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; B32B17/10165; B32B17/10174; B32B17/1022
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) | 1936-11-13 | 1937-05-15 | 1937-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-11-13 | 1941-05-15 | 1941-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-11-13 | 1945-05-15 | 1945-11-14 | $7700.00 | Window Closed / Lapsed |