US2463453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitric acid concentration
Assignee: Chemical Construction Corp
•
Filing: 1946-03-29
•
Granted: 1949-03-01
•
Expires: 1966-03-29
Abstract
No abstract record available.
Inventors
- 👤 Alling P Beardaley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:33
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/20; C01B21/38; C01B21/44; Y; Y10; Y10S; Y10S159/00; Y10S159/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2324955A
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US2357095A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-29 | 1952-08-30 | 1953-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-29 | 1956-08-30 | 1957-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-29 | 1960-08-30 | 1961-03-01 | $7700.00 | Window Closed / Lapsed |