US2337460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation of thin films upon glass surfaces
Assignee: PPG Industries Inc
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Filing: 1942-02-25
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Granted: 1943-12-21
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Expires: 1962-02-25
Abstract
No abstract record available.
Inventors
- 👤 Preston W French
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:27
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/22; C03C15/00; C03C2217/00; C03C2217/20; C03C2217/28; C03C2217/284; C03C2217/285; C03C2218/00; C03C2218/10; C03C2218/15
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) | 1946-12-20 | 1947-06-21 | 1947-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-12-20 | 1951-06-21 | 1951-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-12-20 | 1955-06-21 | 1955-12-21 | $7700.00 | Window Closed / Lapsed |