Patent US2021949A successfully refreshed from Google Patents.
US2021949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pigment dispersion
Assignee: Individual
•
Filing: 1933-11-22
•
Granted: 1935-11-26
•
Expires: 1953-11-22
Abstract
No abstract record available.
Inventors
- 👤 Harry E Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:55
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08J2301/00; C08J2301/08; C08J2301/16; C08J2301/18
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) | 1938-11-25 | 1939-05-27 | 1939-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-11-25 | 1943-05-27 | 1943-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-11-25 | 1947-05-27 | 1947-11-26 | $7700.00 | Window Closed / Lapsed |