Patent US2041397A successfully refreshed from Google Patents.
US2041397A
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US
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Treating sulphur-mining bleed-water
Assignee: Beazer East Inc
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Filing: 1934-09-25
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Granted: 1936-05-19
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Expires: 1954-09-25
Abstract
No abstract record available.
Inventors
- 👤 Carl E Butterworth
- 👤 James W Schwab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:55
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/64
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) | 1939-05-19 | 1939-11-18 | 1940-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-05-19 | 1943-11-18 | 1944-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-05-19 | 1947-11-18 | 1948-05-19 | $7700.00 | Window Closed / Lapsed |