USRE21530E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid substituted hydroxy alkylr-
Assignee: —
•
Filing: —
•
Granted: 1940-08-13
•
Expires: 1957-08-13
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:58
CPC Classifications
C; C09; C09C; C09C3/00; C09C3/08; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/175; C09K; C09K23/00; C09K23/16
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) | 1943-08-13 | 1944-02-12 | 1944-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-08-13 | 1948-02-12 | 1948-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-08-13 | 1952-02-12 | 1952-08-13 | $7700.00 | Window Closed / Lapsed |