US3301823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of highly elastic polyurethanes utilizing dihydrazino-di-s-triazine compounds as chain extenders
Assignee: BASF SE
•
Filing: 1964-12-03
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Granted: 1967-01-31
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Expires: 1984-12-03
Abstract
No abstract record available.
Inventors
- 👤 Gehm Robert
- 👤 Kunde Joachim
- 👤 Mertes Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:39
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; Y; Y10; Y10S; Y10S528/00; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS FOR THE PRODUCTION OF HIGHLY ELASTIC ARTICLES WHICH COMPRISES REACTING, IN AN INERT, POLAR SOLVENT, (A) AN ISOCYANATE-MODIFIED POLYMER HAVING A MOLECULAR WEIGHT OF FROM ABOUT 750 TO ABOUT 6,000 AND PREPARED BY REACTING ONE MOLE OF A POLYHYDROXY COMPOUND HAVING TERMINAL HYDROXYL GROUPS WITH AT LEAST TWO MOLES OF AN ORGANIC DISIOCYANATE WITH (B) A COMPOUND HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
63 words
A PROCESS FOR THE PRODUCTION OF HIGHLY ELASTIC ARTICLES WHICH COMPRISES REACTING, IN AN INERT, POLAR SOLVENT, (A) AN ISOCYANATE-MODIFIED POLYMER HAVING A MOLECULAR WEIGHT OF FROM ABOUT 750 TO ABOUT 6,000 AND PREPARED BY REACTING ONE MOLE OF A POLYHYDROXY COMPOUND HAVING TERMINAL HYDROXYL GROUPS WITH AT LEAST TWO MOLES OF AN ORGANIC DISIOCYANATE WITH (B) A COMPOUND HAVING THE GENERAL FORMULA
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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |