Patent US994431A successfully refreshed from Google Patents.
US994431A
Expired / Lapsed
US
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Apparatus for supplying lime to ammonia-stills.
Assignee: Individual
•
Filing: 1908-09-11
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Granted: 1911-06-06
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Expires: 1928-09-11
Abstract
No abstract record available.
Inventors
- 👤 John S Unger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:20
CPC Classifications
C; C10; C10B; C10B31/00; C10B31/02; C10B31/04; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86413
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) | 1914-06-05 | 1914-12-05 | 1915-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1918-06-05 | 1918-12-05 | 1919-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1922-06-05 | 1922-12-05 | 1923-06-06 | $7700.00 | Window Closed / Lapsed |