US2849486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitrogenous condensation product
Assignee: Dow Chemical Co
•
Filing: 1955-10-26
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Granted: 1958-08-26
•
Expires: 1975-10-26
Abstract
No abstract record available.
Inventors
- 👤 William F Tousignant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:24
CPC Classifications
C; C07; C07C; C07C251/00; C07C251/02; C07C251/04; C07C249/00; C07C249/02; C10; C10M; C10M2207/00; C10M2207/28; C10M2207/282
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A COMPOSITION COMPRISING A COLORLESS, WATER SOLUBLE CONDENSATION PRODUCT OBTAINED BY THE REACTION OF FROM 2.0 TO 2.5 MOLES OF FORMALDEHYDE WITH ONE MOLE OF 3,3''DIAMINODIPROPYLAMINE AT A TEMPERATURE NOT GREATER THAN 50*C.
Claim 2
Dependent Claim
33 words
A COMPOSITION COMPRISING A COLORLESS, WATER SOLUBLE CONDENSATION PRODUCT OBTAINED BY THE REACTION OF FROM 2.0 TO 2.5 MOLES OF FORMALDEHYDE WITH ONE MOLE OF 3,3''DIAMINODIPROPYLAMINE AT A TEMPERATURE NOT GREATER THAN 50*C.
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) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |