US1995647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for and improvement in carrying out chemical processes at elevated temperatures
Assignee: IG Farbenindustrie AG
•
Filing: 1931-07-17
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Granted: 1935-03-26
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Expires: 1951-07-17
Abstract
No abstract record available.
Inventors
- 👤 Pier Mathias
- 👤 Dinkler Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:17
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/02; B01J2219/00; B01J2219/02; B01J2219/025; B01J2219/0277
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) | 1938-03-25 | 1938-09-24 | 1939-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-03-25 | 1942-09-24 | 1943-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-03-25 | 1946-09-24 | 1947-03-26 | $7700.00 | Window Closed / Lapsed |