Patent US2953597A successfully refreshed from Google Patents.
US2953597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystalline water-soluble condensation product and process of making same
Assignee: Takeda GmbH
•
Filing: 1958-02-18
•
Granted: 1960-09-20
•
Expires: 1978-02-18
Abstract
No abstract record available.
Inventors
- 👤 Gedeon Joseph
- 👤 Bolz Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:29
CPC Classifications
C; C07; C07C; C07C309/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
16 words
THE WATER-SOLUBLE, CRYSTALLINE, AND UNIFORM CONDENSATION PRODUCT OF M-CRESOL SULFONIC ACID AND FORMALDEHYDE OF THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |