US3047540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane plastics
Assignee: Bayer AG
•
Filing: 1960-01-12
•
Granted: 1962-07-31
•
Expires: 1980-01-12
Abstract
No abstract record available.
Inventors
- 👤 Merten Rudolf
- 👤 Loew Gunther
- 👤 Bayer Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:17
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/34; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/09; C08G18/092; C08G18/16; C08G18/18; C08G18/22; C08G18/225; C08G18/24; C08G18/242; C08G18/28; C08G18/40; C08G18/42; C08G18/4244; C08G18/4247; C08G18/425; C08G18/4252; C08G18/4263; C08G18/48; C08G18/4887; C08G18/67; C08G18/6795; C08G18/68; C08G2110/00; C08G2110/0008; C08G2110/0016; C08G2110/0025; C08G2110/0033; C08G2110/0041; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
THE METHOD OF CATALYZING THE REACTION BETWEEN AN ORGANIC ISOCYANNE AND AN ORGANIC COMPOUND CONTAINING AT LEAST ONE ACTIVE HYDROGEN-CONTAINING GROUP AS DETERMINED BY THE ZEREWITNOFF METHOD WHICH COMPRISES MIXING SAID MATERIALS IN THE PRESENCE OF A CATALYSTIC AMOUNT OF AN ORGANO-TIN CHELATE WITH AN ORGANIC CHELATING AGENT AND CONTAINING AT LEAST ONE CARBON TO TIN BOND AND CONTAINING AT LEAST ONE TERITARY NITROGEN ATOM, THE ARRANGEMENT OF THE TERTIARY NITROGEN AND THE TIN IN THE COMPOUND BEING SUCH THAT EACH OF THESE FUNCTIONS AS A CATALYST IN THE REACTION.
Claim 2
Independent Claim
90 words
THE METHOD OF CATALYZING THE REACTION BETWEEN AN ORGANIC ISOCYANNE AND AN ORGANIC COMPOUND CONTAINING AT LEAST ONE ACTIVE HYDROGEN-CONTAINING GROUP AS DETERMINED BY THE ZEREWITNOFF METHOD WHICH COMPRISES MIXING SAID MATERIALS IN THE PRESENCE OF A CATALYSTIC AMOUNT OF AN ORGANO-TIN CHELATE WITH AN ORGANIC CHELATING AGENT AND CONTAINING AT LEAST ONE CARBON TO TIN BOND AND CONTAINING AT LEAST ONE TERITARY NITROGEN ATOM, THE ARRANGEMENT OF THE TERTIARY NITROGEN AND THE TIN IN THE COMPOUND BEING SUCH THAT EACH OF THESE FUNCTIONS AS A CATALYST IN THE REACTION.
References Cited (Backward Citations)
US2921915A
Cited
US2933462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |