Patent US3756797A successfully refreshed from Google Patents.
US3756797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for bending a sheet of glass
Assignee: AGC Inc
•
Filing: 1971-07-16
•
Granted: 1973-09-04
•
Expires: 1991-07-16
Abstract
Abstract A sheet of glass positioned on a truck type bending mold having suitable curvature and latticework is conveyed into a main heating zone being received in a hearth bed therein having grooves corresponding to the lattice- work for ejecting hot gas from a plurality of holes to the lower surface of the glass on the truck, whereby a sheet of glass having a complex shape may be accurately bent into a predetermined curvature.
Inventors
- 👤 K Akeyoshi
- 👤 K Suga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:25
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/02; C03B23/023; C03B23/025; C03B23/0252; C03B23/0258
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |