Patent US1185571A successfully refreshed from Google Patents.
Patent US4692045A successfully refreshed from Google Patents.
Patent US4303252A successfully refreshed from Google Patents.
Patent US3480232A successfully refreshed from Google Patents.
Patent US3374141A successfully refreshed from Google Patents.
US3374141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Etching process for producing a nonreflective surface on float glass
Assignee: PPG Industries Inc
•
Filing: 1967-03-20
•
Granted: 1968-03-19
•
Expires: 1987-03-20
Abstract
No abstract record available.
Inventors
- 👤 Albert E Junge
- 👤 Chabal Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:39
CPC Classifications
C; C03; C03C; C03C15/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2622016A
Cited
US3337323A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |