Patent US2164793A successfully refreshed from Google Patents.
US2164793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymethine dyestuffs
Assignee: General Aniline Works Inc
•
Filing: 1936-08-31
•
Granted: 1939-07-04
•
Expires: 1956-08-31
Abstract
No abstract record available.
Inventors
- 👤 Winter Carl
- 👤 Roh Nikolaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:43
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/14; C09B23/145; C09B11/00; C09B11/04; C09B11/10; C09B11/12; C09B11/26; C09B23/02; C09B23/06; C09B23/10; C09B23/105
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) | 1942-07-03 | 1943-01-02 | 1943-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-07-03 | 1947-01-02 | 1947-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-07-03 | 1951-01-02 | 1951-07-04 | $7700.00 | Window Closed / Lapsed |