US2348704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of glass surfaces
Assignee: PPG Industries Inc
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Filing: 1940-09-21
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Granted: 1944-05-16
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Expires: 1960-09-21
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:51
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/10; G02B1/11; G02B1/113
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) | 1947-05-16 | 1947-11-15 | 1948-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-05-16 | 1951-11-15 | 1952-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-05-16 | 1955-11-15 | 1956-05-16 | $7700.00 | Window Closed / Lapsed |