Patent US2806052A successfully refreshed from Google Patents.
Patent US6030901A successfully refreshed from Google Patents.
Patent US657880A successfully refreshed from Google Patents.
US657880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compound of vinyldiaceton-alkamins and process of making same.
Assignee: CHEMISCHE FABRIK AUF ACTIEN VORMALS E SCHERING
•
Filing: 1896-09-26
•
Granted: 1900-09-11
•
Expires: 1916-09-26
Abstract
No abstract record available.
Inventors
- 👤 Albrecht Schmidt
- 👤 George Merling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:18
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/06; C07D211/36; C07D211/40; C07D211/44; C07D211/46
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1903-09-11 | 1904-03-12 | 1904-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-09-11 | 1908-03-12 | 1908-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-09-11 | 1912-03-12 | 1912-09-11 | $7700.00 | Window Closed / Lapsed |