US3536699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aralkyl-substituted lactams and cyclic ureas and process for their production
Assignee: Cassella Farbwerke Mainkur AG
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Filing: 1967-07-14
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Granted: 1970-10-27
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Expires: 1987-07-14
Abstract
No abstract record available.
Inventors
- 👤 Hanswilli Von Brachel
- 👤 Karl Hintermeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:44
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/18; C07D207/22; C07D207/24; C07D207/26; C07D207/263; C07D207/267; C07D205/00; C07D205/02; C07D205/06; C07D205/08; C07D211/00; C07D211/04; C07D211/68; C07D211/72; C07D211/74; C07D233/00; C07D233/04; C07D233/28; C07D233/30; C07D233/32
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) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |