US2149249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of aqueous solutions of sulphur and metal sulphides
Assignee: Individual
•
Filing: 1937-08-17
•
Granted: 1939-02-28
•
Expires: 1957-08-17
Abstract
No abstract record available.
Inventors
- 👤 Nitsche Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:47
CPC Classifications
A; A01; A01N; A01N59/00; A01N59/02; A01N59/16; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/06
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) | 1942-02-27 | 1942-08-29 | 1943-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-02-27 | 1946-08-29 | 1947-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-02-27 | 1950-08-29 | 1951-02-28 | $7700.00 | Window Closed / Lapsed |