US2656383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of carbodiimides
Assignee: Bayer AG
•
Filing: 1951-01-03
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Granted: 1953-10-20
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Expires: 1971-01-03
Abstract
No abstract record available.
Inventors
- 👤 Schmidt Erich
- 👤 Schnegg Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:20
CPC Classifications
C; C07; C07C; C07C267/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
A PROCESS OF PRODUCING CARBODIMIDES, WHICH PROCESS COMPRISES CONTACTING AN EXCESS OF AN AQUEOUS SOLUTION OF AN ALKALI METAL HYPOHALITE WITH A THIOUREA HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
27 words
A PROCESS OF PRODUCING CARBODIMIDES, WHICH PROCESS COMPRISES CONTACTING AN EXCESS OF AN AQUEOUS SOLUTION OF AN ALKALI METAL HYPOHALITE WITH A THIOUREA HAVING THE GENERAL FORMULA
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) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |