Patent US2817675A successfully refreshed from Google Patents.
US2817675A
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Basic condensation products containing nitrogen
Assignee: Saul and Co
•
Filing: 1952-12-04
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Granted: 1957-12-24
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Expires: 1972-12-04
Abstract
No abstract record available.
Inventors
- 👤 Hofer Kurt
- 👤 Hemmi Hans Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:44
CPC Classifications
C; C07; C07C; C07C237/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
BASE NITROGENOUS CONDENSATION PRODUCT SELECTED FROM THE GROUP CONSISTING OF THE PRODUCTS OF THE FORMULAE
Claim 2
Dependent Claim
15 words
BASE NITROGENOUS CONDENSATION PRODUCT SELECTED FROM THE GROUP CONSISTING OF THE PRODUCTS OF THE FORMULAE
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) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |