Patent US2333137A successfully refreshed from Google Patents.
US2333137A
Expired / Lapsed
US
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Acid wool dyestuffs
Assignee: GAF Chemicals Corp
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Filing: 1940-06-14
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Granted: 1943-11-02
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Expires: 1960-06-14
Abstract
No abstract record available.
Inventors
- 👤 Zerweck Werner
- 👤 Heinrich Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:07
CPC Classifications
B; B28; B28B; B28B11/00; B28B11/14; B28B11/16; B28B11/161; C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/32; C09B1/34; C09B62/00; C09B62/44; C09B62/78; C09B62/80
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) | 1946-11-01 | 1947-05-03 | 1947-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-11-01 | 1951-05-03 | 1951-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-11-01 | 1955-05-03 | 1955-11-02 | $7700.00 | Window Closed / Lapsed |