Patent US2006031A successfully refreshed from Google Patents.
US2006031A
Expired / Lapsed
US
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Apparatus for the manufacture of sulphuric acid
Assignee: Firm Sulfurit S A
•
Filing: 1929-04-05
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Granted: 1935-06-25
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Expires: 1949-04-05
Abstract
No abstract record available.
Inventors
- 👤 Rothammel Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:06
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/82; C01B17/84
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) | 1938-06-24 | 1938-12-24 | 1939-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-06-24 | 1942-12-24 | 1943-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-06-24 | 1946-12-24 | 1947-06-25 | $7700.00 | Window Closed / Lapsed |