Patent US1700546A successfully refreshed from Google Patents.
US1700546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture and production of 2-hydroxy-3-carboxy naphthalene and its metallic salts
Assignee: Individual
•
Filing: 1927-06-01
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Granted: 1929-01-29
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Expires: 1947-06-01
Abstract
No abstract record available.
Inventors
- 👤 Schwenk Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:00
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/41; C07C51/416
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) | 1932-01-29 | 1932-07-30 | 1933-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-01-29 | 1936-07-30 | 1937-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-01-29 | 1940-07-30 | 1941-01-29 | $7700.00 | Window Closed / Lapsed |