US1677823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyhydroxy-mercury compound
Assignee: Winthrop Chemical Co Inc
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Filing: 1927-05-05
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Granted: 1928-07-17
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Expires: 1947-05-05
Abstract
No abstract record available.
Inventors
- 👤 Gunzler Heinrich
- 👤 Neubert Oskar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:01
CPC Classifications
C; C07; C07F; C07F3/00; C07F3/10; C07F3/12
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) | 1931-07-17 | 1932-01-16 | 1932-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-07-17 | 1936-01-16 | 1936-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-07-17 | 1940-01-16 | 1940-07-17 | $7700.00 | Window Closed / Lapsed |