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Patent US2012073A successfully refreshed from Google Patents.
US2012073A
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US
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Thio-sulphates and sulphonates of compound ethers and a method of preparing the same
Assignee: UNICHEM CHEMIKALIEN HANDELS A
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Filing: 1932-09-15
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Granted: 1935-08-20
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Expires: 1952-09-15
Abstract
No abstract record available.
Inventors
- 👤 Schirm Erik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:05
CPC Classifications
C; C07; C07C; C07C381/00; C07C381/02; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03
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) | 1938-08-19 | 1939-02-18 | 1939-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-08-19 | 1943-02-18 | 1943-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-08-19 | 1947-02-18 | 1947-08-20 | $7700.00 | Window Closed / Lapsed |