US3028271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid composite rocket propellants containing amide epoxide polymers
Assignee: North American Aviation Corp
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Filing: 1956-08-24
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Granted: 1962-04-03
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Expires: 1976-08-24
Abstract
No abstract record available.
Inventors
- 👤 Thomas F Dixon
- 👤 Ernest J Zeilberger
- 👤 James H Langworthy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:45
CPC Classifications
C; C08; C08L; C08L63/00; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
129 words
A COMBUSTIBLE COMPOSITION USEFUL AS A ROCKET PROPELLENT CONSISTING ESSENTIALLY OF (1) AN AMIDE GLYCIDYL POLYETHER POLYMERIZED COMPOSITION OBTAINED BY COPOLYMERIZING A POLYAMIDE WITH A GLYCIDYL POLYETHER COMPOUND; SAID POLYAMIDE BEING OBTAINED BY REACTING AN ORGANIC ACID HAVING FROM 2 TO ABOUT 3 CARBOXY GROUPS AND FROM 2 TO ABOUT 36 CARBON ATOMS SELECTED FROM THE CLASS CONSISTING OF OXALIC ACID, POLYCARBOXYLIC ALIPHATIC ACIDS, POLYCARBOXYLIC ACIDS OF BENZENE, AND POLYCARBOXYLIC ACIDS OF LOWER ALKYL BENZENES, WITH AN ORGANIC POLYAMINE HAVING FROM 2 TO ABOUT 5 NITROGEN ATOMS, FROM 1 TO ABOUT 25 CARBON ATOMS, AND HAVING AT LEAST 1 HYDROGEN ATTACHED TO EACH OF AT LEAST 2 NITROGEN ATOMS, SAID AMINE BEING SELECTED FROM THE CLASS CONSISTING OF ALKYL POLYAMINES, PHENYLPOLYAMINES, ALKYLPHENYLPOLYAMINES, AND SUBSTITUTED UREAS HAVING THE GENERAL FORMULA
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) | 1965-04-02 | 1965-10-02 | 1966-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-02 | 1969-10-02 | 1970-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-02 | 1973-10-02 | 1974-04-03 | $7700.00 | Window Closed / Lapsed |