US4000023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bonding agents for polyurethane
Assignee: Aerojet Rocketdyne Inc
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Filing: 1968-12-09
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Granted: 1976-12-28
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Expires: 1988-12-09
Abstract
Abstract This patent describes a novel solid rocket propellant comprising a polyurethane binder, a solid ammonium perchlorate oxidizing agent, and an effective bond improving amount of a bonding agent having the general formula: X.sub.2 N(CH.sub.2 CH.sub.2 NX).sub.n CH.sub.2 CH.sub.2 NX.sub.2 wherein n is an integer and can assume values from 1 to 12, and X is hydrogen, cyanoethyl, hydroxypropyl or mixtures thereof with the proviso that at least one of said X groups is hydrogen.
Inventors
- 👤 Adolf E. Oberth
- 👤 Rolf S. Bruenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:33
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B23/00; C06B23/001; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/222
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
24 words
A novel solid rocket propellant comprises a polyurethane binder, ammonium perchlorate oxidizing agent, and an effective bond improving amount of cyanoethyl substituted tetraethylene pentamine.
Claim 2
Dependent Claim
24 words
A novel solid rocket propellant comprises a polyurethane binder, ammonium perchlorate oxidizing agent, and an effective bond improving amount of cyanoethyl substituted tetraethylene pentamine.
Claim 3
Dependent Claim
23 words
A novel solid rocket propellant comprises a polyurethane binder, ammonium perchlorate oxidizing agent, and an effective bond improving amount of dihyrdoxypropyl tetraethylene pentamine.
Claim 4
Dependent Claim
23 words
A novel solid rocket propellant comprises a polyurethane binder, ammonium perchlorate oxidizing agent, and an effective bond improving amount of dihyrdoxypropyl tetraethylene pentamine.
Claim 5
Dependent Claim
24 words
A novel solid rocket propellant comprises a polyurethane binder, ammonium perchlorate oxidizing agent, and an effective bond improving amount of dihydroxypropyl, cyanoethyl tetraethylene pentamine.
Claim 6
Dependent Claim
24 words
A novel solid rocket propellant comprises a polyurethane binder, ammonium perchlorate oxidizing agent, and an effective bond improving amount of dihydroxypropyl, cyanoethyl tetraethylene pentamine.
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) | 1979-12-28 | 1980-06-28 | 1980-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-28 | 1984-06-28 | 1984-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-28 | 1988-06-28 | 1988-12-28 | $7700.00 | Window Closed / Lapsed |