Patent EP0569030A1 successfully refreshed from Google Patents.
US2636028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic acid-polyamine adducts
Assignee: Shell Development Co
•
Filing: 1950-03-24
•
Granted: 1953-04-21
•
Expires: 1970-03-24
Abstract
No abstract record available.
Inventors
- 👤 Harry J Sommer
- 👤 Tom B Albin
- 👤 Paul H Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:08
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C09; C09G; C09G1/00; C09G1/06; C09G1/08; D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/55; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54; D21H17/55; C10M2201/00; C10M2201/10; C10M2201/105; C10M2201/14; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/02; C10M2217/04; C10M2217/046; C10M2217/06; C10M2221/00; C10M2221/04; C10M2221/043; C10M2225/00; C10M2225/02; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
AN-ACYL-N-ACYLOXY-SUBSTITUTED POLYMERIC CONDENSATION PRODUCT OF EPICHLOROHYDRIN AND AMMONIA, WHICH POLYMERIC CONDENSATION PRODUCT CONTAINS A PLURALITY OF ATOMS OF EACH OF OXYGEN AND NITROGEN AND IS PRODUCED BY CONDENSING EPICHLOROHYDRIN WITH AMMONIA PRESENT IN AMOUNT CORRESPONDING TO FROM ABOUT 4 TO ABOUT 20 MOLES OF AMMONIA PER MOLE OF EPICHLORHYDRIN IN SOLUTION IN A POLAR SOLVENT HAVING A CONCENTRATION OF AT LEAST 15% NH3, BASED UPON THE WEIGHT OF THE POLAR SOLVENTS, AT A TEMPERATURE OF FROM ABOUT 20* C. TO ABOUT 100* C. AND HEATING THE RESULTING PRODUCT IN THE PRESENCE OF ADDED FIXED ALKALI TO A TEMPERATURE ABOVE ABOUT 125* C.
Claim 2
Dependent Claim
102 words
AN-ACYL-N-ACYLOXY-SUBSTITUTED POLYMERIC CONDENSATION PRODUCT OF EPICHLOROHYDRIN AND AMMONIA, WHICH POLYMERIC CONDENSATION PRODUCT CONTAINS A PLURALITY OF ATOMS OF EACH OF OXYGEN AND NITROGEN AND IS PRODUCED BY CONDENSING EPICHLOROHYDRIN WITH AMMONIA PRESENT IN AMOUNT CORRESPONDING TO FROM ABOUT 4 TO ABOUT 20 MOLES OF AMMONIA PER MOLE OF EPICHLORHYDRIN IN SOLUTION IN A POLAR SOLVENT HAVING A CONCENTRATION OF AT LEAST 15% NH3, BASED UPON THE WEIGHT OF THE POLAR SOLVENTS, AT A TEMPERATURE OF FROM ABOUT 20* C. TO ABOUT 100* C. AND HEATING THE RESULTING PRODUCT IN THE PRESENCE OF ADDED FIXED ALKALI TO A TEMPERATURE ABOVE ABOUT 125* C.
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) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |