Patent US2005986A successfully refreshed from Google Patents.
Patent US2328759A successfully refreshed from Google Patents.
US2328759A
Expired / Lapsed
US
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Removing odor of nigrosines and indulines
Assignee: GAF Chemicals Corp
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Filing: 1938-06-13
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Granted: 1943-09-07
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Expires: 1958-06-13
Abstract
No abstract record available.
Inventors
- 👤 Wahl Ottmar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:34
CPC Classifications
C; C09; C09B; C09B17/00; C09B17/02; C09B67/00; C09B67/0001; C09B67/0017
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) | 1946-09-06 | 1947-03-08 | 1947-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-09-06 | 1951-03-08 | 1951-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-09-06 | 1955-03-08 | 1955-09-07 | $7700.00 | Window Closed / Lapsed |