US2680936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for bending and tempering sheets of glass
Assignee: Pilkington Group Ltd
•
Filing: 1949-08-24
•
Granted: 1954-06-15
•
Expires: 1969-08-24
Abstract
No abstract record available.
Inventors
- 👤 Grotefeld Augustus William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:04
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
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1041329A
Cited
US1107072A
Cited
US1161998A
Cited
US2250628A
Cited
US2182448A
Cited
US2247118A
Cited
US2348887A
Cited
US2369368A
Cited
GB616445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-14 | 1957-12-14 | 1958-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-14 | 1961-12-14 | 1962-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-14 | 1965-12-14 | 1966-06-15 | $7700.00 | Window Closed / Lapsed |