Patent US3573022A successfully refreshed from Google Patents.
US3573022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for shaping glass sheets
Assignee: PPG Industries Inc
•
Filing: 1968-03-11
•
Granted: 1971-03-30
•
Expires: 1988-03-11
Abstract
Abstract GLASS SHEETS ARE SHAPED BETWEEN PRESS SHAPING MOLDS HAVING FORAMINOUS SHAPING SURFACES. HEATED GAS AND COOLED GAS ARE APPLIED THROUGH THE FORAMINA OF THE SHAPING SURFACES TO SEPARATE THE SHEET FROM A FORAMINOUS SURFACE IN CONTACT WHEREWITH AND TO COOL THE GLASS SHEET RESPECTIVITY. RECIPROCATING MEMBERS ENGAGE THE EDGES OF THE SHEET TO RECIPROCATE THE SHEET IN A GENERALLY HORIZONTAL DIRECTION UNTIL THE GLASS SHEET IS NO LONGER IN A DEFORMABLE STATE.
Inventors
- 👤 Robert G Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:58
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/02; C03B23/023; C03B23/03; C03B23/0307; C03B27/00; C03B27/04; C03B27/0404; C03B27/0417; C03B27/044; C03B27/0442; C03B27/0445
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |