US1012272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of and apparatus for purifying ammonia.
Assignee: Semet Solvay Co
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Filing: 1909-03-30
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Granted: 1911-12-19
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Expires: 1929-03-30
Abstract
No abstract record available.
Inventors
- 👤 John D Pennock
- 👤 Edwin C Witherby
- 👤 William H Blauvelt
- 👤 Edward N Trump
- 👤 Charles G Tufts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:50
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/26
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) | 1914-12-18 | 1915-06-19 | 1915-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1918-12-18 | 1919-06-19 | 1919-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1922-12-18 | 1923-06-19 | 1923-12-19 | $7700.00 | Window Closed / Lapsed |