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US2028141A
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Process for dyeing or coloring cellulose esters and cellulose ethers
Assignee: FIRM OF SOCIETY OF CHEMICAL INDUSTRY IN BASLE
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Filing: 1932-05-16
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Granted: 1936-01-21
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Expires: 1952-05-16
Abstract
No abstract record available.
Inventors
- 👤 Ackermann Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:28
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/14; C09B23/145; C09B1/00; C09B1/16; C09B1/20; C09B1/205; C09B23/0091; C09B23/02; C09B23/04; C09B23/141; C09B23/143; C09B23/16; C09B23/162; C09B23/164
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) | 1939-01-20 | 1939-07-22 | 1940-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-01-20 | 1943-07-22 | 1944-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-01-20 | 1947-07-22 | 1948-01-21 | $7700.00 | Window Closed / Lapsed |