Patent US2805520A successfully refreshed from Google Patents.
US2805520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for bending and tempering glass
Assignee: PPG Industries Inc
•
Filing: 1952-06-10
•
Granted: 1957-09-10
•
Expires: 1972-06-10
Abstract
No abstract record available.
Inventors
- 👤 Lloyd V Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:55
CPC Classifications
C; C03; C03B; C03B27/00; C03B27/04; C03B27/044; C03B27/0442; C03B27/0445; C03B23/00; C03B23/02; C03B23/023; C03B23/025; C03B23/0252; C03B35/00; C03B35/14; C03B35/20; C03B35/202
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1107072A
Cited
US1454200A
Cited
DE616445C
Cited
US2213406A
Cited
US2259727A
Cited
US2297315A
Cited
US2450297A
Cited
US2376872A
Cited
US2525112A
Cited
US2408526A
Cited
GB591069A
Cited
US2646647A
Cited
US2518951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |