US2040359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification and extraction of sulphur bearing material
Assignee: MANCHESTER OXIDE CO Ltd
•
Filing: 1932-07-08
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Granted: 1936-05-12
•
Expires: 1952-07-08
Abstract
No abstract record available.
Inventors
- 👤 Clayton Robert Henry
- 👤 Williams Herbert Ernest
- 👤 Avery Hugh Burton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:49
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/027; C01B17/033; C01B17/0232
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) | 1939-05-12 | 1939-11-11 | 1940-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-05-12 | 1943-11-11 | 1944-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-05-12 | 1947-11-11 | 1948-05-12 | $7700.00 | Window Closed / Lapsed |