Patent US3927373A successfully refreshed from Google Patents.
US2318959A
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US
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Artificial glass
Assignee: PPG Industries Inc
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Filing: 1940-04-04
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Granted: 1943-05-11
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Expires: 1960-04-04
Abstract
No abstract record available.
Inventors
- 👤 Irving E Muskat
- 👤 Maxwell A Pollack
- 👤 Strain Franklin
- 👤 William A Frantz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:01
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/20; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/239; Y10T428/24; Y10T428/24942; Y10T428/24983
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) | 1946-05-10 | 1946-11-09 | 1947-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-05-10 | 1950-11-09 | 1951-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-05-10 | 1954-11-09 | 1955-05-11 | $7700.00 | Window Closed / Lapsed |