Patent US2728275A successfully refreshed from Google Patents.
Patent US2622075A successfully refreshed from Google Patents.
US2622075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamine-cyanamide resins
Assignee: Sandoz AG
•
Filing: 1947-12-01
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Granted: 1952-12-16
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Expires: 1967-12-01
Abstract
No abstract record available.
Inventors
- 👤 Hemmi Hans Martin
- 👤 Trefzer Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:25
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/52; D06P1/5264; D06P1/5285; C; C08; C08G; C08G73/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A PROCESS FOR THE MANUFACTURE OF A WATERSOLUBLE POLYMERIC ORGANIC NITROGEN COMPOUND, WHICH COMPRISES HEATING, AS SOLE REACTANTS, ONE MOL OF AN AMINE OF THE FORMULA
Claim 2
Dependent Claim
26 words
A PROCESS FOR THE MANUFACTURE OF A WATERSOLUBLE POLYMERIC ORGANIC NITROGEN COMPOUND, WHICH COMPRISES HEATING, AS SOLE REACTANTS, ONE MOL OF AN AMINE OF THE FORMULA
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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) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |