US2077831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulphonium compounds and process of making the same
Assignee: FIRM OF SOCIETY OF CHEMICAL INDUSTRY IN BASLE
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Filing: 1935-07-06
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Granted: 1937-04-20
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Expires: 1955-07-06
Abstract
No abstract record available.
Inventors
- 👤 Felix Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:44
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/01; C07C233/16; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05
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) | 1940-04-19 | 1940-10-19 | 1941-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-04-19 | 1944-10-19 | 1945-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-04-19 | 1948-10-19 | 1949-04-20 | $7700.00 | Window Closed / Lapsed |