US2465803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beta-nitroalkane sulfonic acids
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1945-01-02
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Granted: 1949-03-29
•
Expires: 1965-01-02
Abstract
No abstract record available.
Inventors
- 👤 Heath Royden Lewis
- 👤 Piggott Henry Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:58
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/02; C07C309/03; C07C309/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1594547A
Cited
US2170380A
Cited
US1999432A
Cited
US2103879A
Cited
US2265993A
Cited
US2363819A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-28 | 1952-09-27 | 1953-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-28 | 1956-09-27 | 1957-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-28 | 1960-09-27 | 1961-03-29 | $7700.00 | Window Closed / Lapsed |