US2987388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
figure
Assignee: —
•
Filing: —
•
Granted: 1961-06-06
•
Expires: 1978-06-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:28
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/12; C06B21/00; C06B21/0033; C06B45/04; C06B45/06; C06B45/10; C06C; C06C9/00; C06D; C06D5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
213 words
A SHAPED PROPELLANT GRAIN CONSISTING ESSENTIALLY OF (1) A BODY CONSISTING OF (A) AN OXIDIZABLE THERMOPLASTIC BINDER COMPOSED OF A PLASTICIZED CELLULOSIC MATERIAL SAID CELLULOSIC MATERIAL BEING SELECTED FROM THE CLASS CONSISTING OF CELLULOSE ACETATE CONTAINING FROM ABOUT 51% TO ABOUT 57% BY WEIGHT OF ACETIC ACID AND CELLULOSE ACETATE BUTYRATE CONTAINING BETWEEN ABOUT 7% AND 55% OF ACETIC ACID AND BETWEEN ABOUT 16% AND 61% OF BUTYRIC ACID, (B) AN AMMONIUM NITRATE COMBUSTION CATALYST FROM THE CLASS CONSISTING OF PRUSSIAN BLUE, AMMONIUM CHROMATE, AMMONIUM DICHROMATE, ALKALI METAL CHROMATE, ALKALI METAL DICHROMATE AND MONOSODIUM BARBITURATE, SAID CAT-ALYST BEING PRESENT IN AN AMOUNT BETWEEN ABOUT 1 AND 10 PERCENT BY WEIGHT OF SAID BODY AND (C) THE REMAINDER ESSENTIALLY AMMONIUM NITRATE AND (2) A RESTRICTOR COATING POSITIONED ON A PORTION OF THE SURFACE OF SAID BODY WHOSE BURNING IS TO BE DELAYED WITH RESPECT TO THE BURNING OF SURFACE OF SAID BODY WHICH IS NOT RESTRICTOR-COATED WHICH RESTRICTOR COATING IS ON THE ORDER OF 2 TO 10 MILLIMETERS IN THICKNESS AND CONSISTS OF BETWEEN ABOUT 40% AND 60% OF CELLULOSE ACETATE CONTAINING BETWEEN ABOUT 54 AND 56% OF ACETIC ACID AND THE REMAINDER ESSENTIALLY A CITRATE PLASTICIZER SELECTED FROM THE CLASS CONSISTING OF TRIMETHYL CITRATE, TRIETHYL CITRATE ACETYL TRIMETHYL CITRATE AND ACETYL TRIETHYL CITRATE.
Claim 2
Dependent Claim
213 words
A SHAPED PROPELLANT GRAIN CONSISTING ESSENTIALLY OF (1) A BODY CONSISTING OF (A) AN OXIDIZABLE THERMOPLASTIC BINDER COMPOSED OF A PLASTICIZED CELLULOSIC MATERIAL SAID CELLULOSIC MATERIAL BEING SELECTED FROM THE CLASS CONSISTING OF CELLULOSE ACETATE CONTAINING FROM ABOUT 51% TO ABOUT 57% BY WEIGHT OF ACETIC ACID AND CELLULOSE ACETATE BUTYRATE CONTAINING BETWEEN ABOUT 7% AND 55% OF ACETIC ACID AND BETWEEN ABOUT 16% AND 61% OF BUTYRIC ACID, (B) AN AMMONIUM NITRATE COMBUSTION CATALYST FROM THE CLASS CONSISTING OF PRUSSIAN BLUE, AMMONIUM CHROMATE, AMMONIUM DICHROMATE, ALKALI METAL CHROMATE, ALKALI METAL DICHROMATE AND MONOSODIUM BARBITURATE, SAID CAT-ALYST BEING PRESENT IN AN AMOUNT BETWEEN ABOUT 1 AND 10 PERCENT BY WEIGHT OF SAID BODY AND (C) THE REMAINDER ESSENTIALLY AMMONIUM NITRATE AND (2) A RESTRICTOR COATING POSITIONED ON A PORTION OF THE SURFACE OF SAID BODY WHOSE BURNING IS TO BE DELAYED WITH RESPECT TO THE BURNING OF SURFACE OF SAID BODY WHICH IS NOT RESTRICTOR-COATED WHICH RESTRICTOR COATING IS ON THE ORDER OF 2 TO 10 MILLIMETERS IN THICKNESS AND CONSISTS OF BETWEEN ABOUT 40% AND 60% OF CELLULOSE ACETATE CONTAINING BETWEEN ABOUT 54 AND 56% OF ACETIC ACID AND THE REMAINDER ESSENTIALLY A CITRATE PLASTICIZER SELECTED FROM THE CLASS CONSISTING OF TRIMETHYL CITRATE, TRIETHYL CITRATE ACETYL TRIMETHYL CITRATE AND ACETYL TRIETHYL CITRATE.
References Cited (Backward Citations)
US2643611A
Cited
GB655585A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |