US2073004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fireproof material
Assignee: IG Farbenindustrie AG
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Filing: 1933-11-06
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Granted: 1937-03-09
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Expires: 1953-11-06
Abstract
No abstract record available.
Inventors
- 👤 Engelhardt Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:13
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/34; C; C08; C08K; C08K5/00; C08K5/02; C08K5/03; D06; D06M; D06M13/00; D06M13/08; D06M15/00; D06M15/693; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H19/00; D21H19/10; D21H19/14; D21H19/24; D21H5/00; D21H5/0002; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2713
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) | 1940-03-08 | 1940-09-07 | 1941-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-03-08 | 1944-09-07 | 1945-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-03-08 | 1948-09-07 | 1949-03-09 | $7700.00 | Window Closed / Lapsed |