US2450105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for obtaining nitrogen tetroxide
Assignee: EIDP Inc
•
Filing: 1943-02-13
•
Granted: 1948-09-28
•
Expires: 1963-02-13
Abstract
No abstract record available.
Inventors
- 👤 Batchelder George Washington
- 👤 Albert W Hawkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:26
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/20; C01B21/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1324255A
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US1236662A
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US1197295A
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US1590043A
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GB237937A
Cited
US1740549A
Cited
US1755768A
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US1989267A
Cited
GB292951A
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US2169826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-28 | 1952-03-29 | 1952-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-28 | 1956-03-29 | 1956-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-28 | 1960-03-29 | 1960-09-28 | $7700.00 | Window Closed / Lapsed |