Patent US2560518A successfully refreshed from Google Patents.
Patent US3148190A successfully refreshed from Google Patents.
US3148190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triethylenediamine production
Assignee: Air Products and Chemicals Inc
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Filing: 1962-05-17
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Granted: 1964-09-08
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Expires: 1982-05-17
Abstract
No abstract record available.
Inventors
- 👤 Ronald W Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:44
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
IN A METHOD OF MANUFACTURING A TRIETHYLENEDIAMINE TYPE OF COMPOUND HAVING A FORMULA N(CHRCHR)3N IN WHICH AT LEAST 4 OF THE 6 R''S IS HYDROGEN AND EACH OF THE REMAINING 2 R''S IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND METHYL BY DIRECTING A REACTANT STREAM OVER A SOLID CRACKING CATALYST AT AN ELEVATED TEMPERATURE TO PREPARE AN EFFLUENT CONTAINING A TRIETHYLENEDIAMINE TYPE OF COMPOUND, THE IMPROVEMENT WHICH CONSISTS OF: EMPLOYING AS SAID REACTANT STREAM A MIXTURE OF AMMONIA AND A RESIDUUM HAVING A BOILING POINT RANGE OF AT LEAST 40* C. ATTRIBUTABLE TO THE PRESENCE OF A PLURALITY OF AMINE COMPOUNDS IN THE RESIDUUM, THE INITIAL BOILING POINT OF THE RESIDUUM BEING AT LEAST 150*C. AND THE END BOILING POINT BEING NOT MORE THAN 400*C., SAID RESIDUUM RESULTING FROM THE MANUFACTURE OF AMINES STRUCTURALLY RELATED TO THE HERIENAFTER DESCRIBED MONOMERIC IMINE, SAID AMINES BOILING BELOW ABOUT 250*C., SAID RESIDUUM CONSISTING ESSENTIALLY OF SEVERAL COMPOUNDS RESULTING FROM THE POLYMERIZATION OF AN IMINE HAVING A FORMULA OF:
Claim 2
Dependent Claim
167 words
IN A METHOD OF MANUFACTURING A TRIETHYLENEDIAMINE TYPE OF COMPOUND HAVING A FORMULA N(CHRCHR)3N IN WHICH AT LEAST 4 OF THE 6 R''S IS HYDROGEN AND EACH OF THE REMAINING 2 R''S IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND METHYL BY DIRECTING A REACTANT STREAM OVER A SOLID CRACKING CATALYST AT AN ELEVATED TEMPERATURE TO PREPARE AN EFFLUENT CONTAINING A TRIETHYLENEDIAMINE TYPE OF COMPOUND, THE IMPROVEMENT WHICH CONSISTS OF: EMPLOYING AS SAID REACTANT STREAM A MIXTURE OF AMMONIA AND A RESIDUUM HAVING A BOILING POINT RANGE OF AT LEAST 40* C. ATTRIBUTABLE TO THE PRESENCE OF A PLURALITY OF AMINE COMPOUNDS IN THE RESIDUUM, THE INITIAL BOILING POINT OF THE RESIDUUM BEING AT LEAST 150*C. AND THE END BOILING POINT BEING NOT MORE THAN 400*C., SAID RESIDUUM RESULTING FROM THE MANUFACTURE OF AMINES STRUCTURALLY RELATED TO THE HERIENAFTER DESCRIBED MONOMERIC IMINE, SAID AMINES BOILING BELOW ABOUT 250*C., SAID RESIDUUM CONSISTING ESSENTIALLY OF SEVERAL COMPOUNDS RESULTING FROM THE POLYMERIZATION OF AN IMINE HAVING A FORMULA OF:
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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |