US1969397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of compound glass
Assignee: IG Farbenindustrie AG
•
Filing: 1932-04-05
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Granted: 1934-08-07
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Expires: 1952-04-05
Abstract
No abstract record available.
Inventors
- 👤 Dunkel Manfred
- 👤 Wolff Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:38
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31641; Y10T428/31826; Y10T428/31841
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) | 1937-08-06 | 1938-02-05 | 1938-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-08-06 | 1942-02-05 | 1942-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-08-06 | 1946-02-05 | 1946-08-07 | $7700.00 | Window Closed / Lapsed |