Patent US3133897A successfully refreshed from Google Patents.
US3133897A
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Production of polyurea copolymers from an alkylene diamine, a heteromembered alkylene diamine and a urea
Assignee: Toyo Koatsu Industries Inc
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Filing: 1960-03-17
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Granted: 1964-05-19
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Expires: 1980-03-17
Abstract
No abstract record available.
Inventors
- 👤 Inaba Yanosuke
- 👤 Miyake Kunihiko
- 👤 Kimoto Koji
- 👤 Kimura Goro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:26
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
91 words
A PROCESS FOR THE MANUFACTURE OF POLYUREA COPOLYMERS WITH HETERO-MEMBERED ALKYLENE UREA HAVING GOOD SPINNABILITY COMPRISING REACTING IN A FIRST STAGE AT A TEMPERATURE IN THE RANGE OF 80*C. TO 130*C. TO EFFECT SOLUTION THEREOF IN AN INERT ATMOSPHERE A MIXTURE CONTAINING: (A) AT LEAST ONE AND NOT MORE THAN TWO MEMBERS OF THE GROUP CONSISTING OF LINEAR ALKYLENE DIAMINES HAVING FROM 6 TO 9 CARBON ATOMS IN THE ALKYLENE RADICAL AND CARBONATES THEREOF, (B) A MEMBER SELECTED FROM THE GROUP CONSISTING OF HETERO-MEMBERED LINEAR ALKYLENE DIAMINES HAVING THE FORMULA H2N-R1-O-R2-NH2,
Claim 2
Dependent Claim
91 words
A PROCESS FOR THE MANUFACTURE OF POLYUREA COPOLYMERS WITH HETERO-MEMBERED ALKYLENE UREA HAVING GOOD SPINNABILITY COMPRISING REACTING IN A FIRST STAGE AT A TEMPERATURE IN THE RANGE OF 80*C. TO 130*C. TO EFFECT SOLUTION THEREOF IN AN INERT ATMOSPHERE A MIXTURE CONTAINING: (A) AT LEAST ONE AND NOT MORE THAN TWO MEMBERS OF THE GROUP CONSISTING OF LINEAR ALKYLENE DIAMINES HAVING FROM 6 TO 9 CARBON ATOMS IN THE ALKYLENE RADICAL AND CARBONATES THEREOF, (B) A MEMBER SELECTED FROM THE GROUP CONSISTING OF HETERO-MEMBERED LINEAR ALKYLENE DIAMINES HAVING THE FORMULA H2N-R1-O-R2-NH2,
Claim 3
Dependent Claim
44 words
THE PROCESS ACCORDING TO CLAIM 1, WHEREIN THE REACTANTS ARE INITALLY MIXED WITH A VISCOSITY STABILIZER SELECTED FROM THE GROUP CONSISTING OF ALKYLENE MONOAMIDE, N-ACYL ALKYLENE DIAMINE, ALKYL MONOBASIC ACIDS, AND ACYL MONOBASIC ACIDS, WHEREIN SAID MONBASIC ACIDS HAVE AT LEAST 3 CARBON ATOMS.
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) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |