US1864988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ammonia absorbent and process of making the same
Assignee: DAVIS EMERGENCY EQUIPMENT COMP
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Filing: 1930-09-05
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Granted: 1932-06-28
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Expires: 1950-09-05
Abstract
No abstract record available.
Inventors
- 👤 Downs Charles Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:23
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/54; B01D53/58; Y; Y02; Y02A; Y02A50/00; Y02A50/20
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) | 1935-06-28 | 1935-12-28 | 1936-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-06-28 | 1939-12-28 | 1940-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-06-28 | 1943-12-28 | 1944-06-28 | $7700.00 | Window Closed / Lapsed |