US2784166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid compositions comprising a nitrogenous polymer
Assignee: Wyeth Holdings LLC
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Filing: 1954-02-05
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Granted: 1957-03-05
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Expires: 1974-02-05
Abstract
No abstract record available.
Inventors
- 👤 Henry P Wohnsiedler
- 👤 Edward L Kropa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:26
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0273; C08G73/06; C08G73/0622; C08G73/0638; C08G73/0644
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A LIQUID COMPOSITION COMPRISING BY WEIGHT, (1) A MAJOR PROPORTION OF WATER AND (2) A MINOR PROPORTION OF A POLYMER OBTAINED BY MAINTAINING (A) A POLYETHYLENE MELAMINE WHICH IS A POLYMINO-S-TRAZINE WHEREIN AT LEAST TWO OF THE AMINO NITROGEN ATOMS EACH HAS ONE ETHYLENE GROUP ATTACHED THERETO INSTEAD OF THE TWO HYDROGEN ATOMS IN CONTACT WITH (B) ACIDIC WATER UNTIL THE SAID POLYETHYLENE MELAMINE HAS POLYMERIZED TO THE DESIRED DEGREE.
Claim 2
Dependent Claim
70 words
A LIQUID COMPOSITION COMPRISING BY WEIGHT, (1) A MAJOR PROPORTION OF WATER AND (2) A MINOR PROPORTION OF A POLYMER OBTAINED BY MAINTAINING (A) A POLYETHYLENE MELAMINE WHICH IS A POLYMINO-S-TRAZINE WHEREIN AT LEAST TWO OF THE AMINO NITROGEN ATOMS EACH HAS ONE ETHYLENE GROUP ATTACHED THERETO INSTEAD OF THE TWO HYDROGEN ATOMS IN CONTACT WITH (B) ACIDIC WATER UNTIL THE SAID POLYETHYLENE MELAMINE HAS POLYMERIZED TO THE DESIRED DEGREE.
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) | 1960-03-04 | 1960-09-03 | 1961-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-04 | 1964-09-03 | 1965-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-04 | 1968-09-03 | 1969-03-05 | $7700.00 | Window Closed / Lapsed |