US2573489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formaldehyde-dicyandiamide poly-hydroxypropylene-polyamine reaction product
Assignee: Sandoz AG
•
Filing: 1946-03-11
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Granted: 1951-10-30
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Expires: 1966-03-11
Abstract
No abstract record available.
Inventors
- 👤 Rheiner Alfred
- 👤 Hemmi Hans Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:32
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/043; D; D06; D06P; D06P1/00; D06P1/44; D06P1/52; D06P1/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2265944A
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US2258321A
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US2256278A
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US2320225A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |