US3172891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of trffithylenediamine
Assignee: Texaco Inc
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Filing: —
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Granted: 1965-03-09
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Expires: 1982-03-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:31
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A METHOD FOR THE PRODUCTION OF TRIETHYLENEDIAMINE WHICH COMPRISES THE STEPS OF CONTACTING 2-(2-HYDROXYETHOXY) ETHYLAMINE AND AMMONIA WITH ALUMINUM PHOSPHATE AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 250* TO ABOUT 550*C.
Claim 2
Independent Claim
33 words
A METHOD FOR THE PRODUCTION OF TRIETHYLENEDIAMINE WHICH COMPRISES THE STEPS OF CONTACTING 2-(2-HYDROXYETHOXY) ETHYLAMINE AND AMMONIA WITH ALUMINUM PHOSPHATE AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 250* TO ABOUT 550*C.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |