Patent US1618085A successfully refreshed from Google Patents.
US1618085A
Expired / Lapsed
US
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Method of polishing plate glass
Assignee: PPG Industries Inc
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Filing: 1919-10-30
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Granted: 1927-02-15
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Expires: 1939-10-30
Abstract
No abstract record available.
Inventors
- 👤 Philip J Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:08
CPC Classifications
B; B24; B24B; B24B7/00; B24B7/20; B24B7/22; B24B7/24; B24B7/241
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) | 1930-02-14 | 1930-08-16 | 1931-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-02-14 | 1934-08-16 | 1935-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-02-14 | 1938-08-16 | 1939-02-15 | $7700.00 | Window Closed / Lapsed |