Patent US2209674A successfully refreshed from Google Patents.
Patent US1934798A successfully refreshed from Google Patents.
US1934798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for making insulating glass
Assignee: PPG Industries Inc
•
Filing: 1933-01-27
•
Granted: 1933-11-14
•
Expires: 1953-01-27
Abstract
No abstract record available.
Inventors
- 👤 Gelstharp Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:22
CPC Classifications
C; C03; C03B; C03B13/00; C03B13/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1936-11-13 | 1937-05-15 | 1937-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-11-13 | 1941-05-15 | 1941-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-11-13 | 1945-05-15 | 1945-11-14 | $7700.00 | Window Closed / Lapsed |