Patent US2917871A successfully refreshed from Google Patents.
US2917871A
Expired / Lapsed
US
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Apparatus for treating glass
Assignee: PPG Industries Inc
•
Filing: 1955-09-23
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Granted: 1959-12-22
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Expires: 1975-09-23
Abstract
No abstract record available.
Inventors
- 👤 Florian V Atkeson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:36
CPC Classifications
C; C03; C03B; C03B27/00; C03B27/04; C03B27/0417; C03B27/052
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |