US1995360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of sulphuric acid
Assignee: General Chemical Corp
•
Filing: 1930-04-29
•
Granted: 1935-03-26
•
Expires: 1950-04-29
Abstract
No abstract record available.
Inventors
- 👤 Henry F Merriam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:51
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/76; C01B17/765; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y02P20/129
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) | 1938-03-25 | 1938-09-24 | 1939-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-03-25 | 1942-09-24 | 1943-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-03-25 | 1946-09-24 | 1947-03-26 | $7700.00 | Window Closed / Lapsed |