US1690585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating gases bearing gaseous synthetic ammonia
Assignee: ATMOSPHERIC NITROGEN Corp
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Filing: 1923-08-16
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Granted: 1928-11-06
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Expires: 1943-08-16
Abstract
No abstract record available.
Inventors
- 👤 Walter H Kniskern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:38
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/12; Y; Y10; Y10S; Y10S62/00; Y10S62/931; Y10S62/934
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) | 1931-11-06 | 1932-05-07 | 1932-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-11-06 | 1936-05-07 | 1936-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-11-06 | 1940-05-07 | 1940-11-06 | $7700.00 | Window Closed / Lapsed |