US1720547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for drawing sheet glass
Assignee: Pilkington North America Inc
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Filing: 1924-05-15
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Granted: 1929-07-09
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Expires: 1944-05-15
Abstract
No abstract record available.
Inventors
- 👤 Enoch T Ferngren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:08
CPC Classifications
C; C03; C03B; C03B17/00; C03B17/06; C03B17/064
Claims Analysis
Total Claims: 0
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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) | 1932-07-08 | 1933-01-07 | 1933-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-07-08 | 1937-01-07 | 1937-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-07-08 | 1941-01-07 | 1941-07-09 | $7700.00 | Window Closed / Lapsed |