US1398050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing flat parallel-sided glass sheets
Assignee: PPG Industries Inc
•
Filing: 1918-12-05
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Granted: 1921-11-22
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Expires: 1938-12-05
Abstract
No abstract record available.
Inventors
- 👤 William H Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:09
CPC Classifications
B; B24; B24B; B24B7/00; B24B7/20; B24B7/22; B24B7/24; B24B7/242; B24B7/245
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) | 1924-11-21 | 1925-05-23 | 1925-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-11-21 | 1929-05-23 | 1929-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-11-21 | 1933-05-23 | 1933-11-22 | $7700.00 | Window Closed / Lapsed |