US2992911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing rocket fuel containing polymerized olefins and boron
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1950-08-16
•
Granted: 1961-07-18
•
Expires: 1970-08-16
Abstract
No abstract record available.
Inventors
- 👤 Whitworth Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:36
CPC Classifications
C; C06; C06B; C06B25/00; C06B25/34; C06B21/00; C06B21/0083; Y; Y10; Y10S; Y10S149/00; Y10S149/11; Y10S149/112
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
70 words
A METHOD OF EFFECTING THE SURFACE MODERATION OF A PRE-FORMED DOUBLE BASE SMOKELESS PROPELLENT POWDER CONTAINING CHEMICALLY UNCOMBINED NITROGUANIDINE WHICH COMPRISES TREATING THE PRE-FORMED POWDER SURFACE WITH SYMMETRICAL DIETHYL DIPHENYL UREA IN A QUANTITY SUFFICIENT TO FORM IN SITU BY INTERACTION WITH THE SAID NITROGUANIDINE A ZONE OF INWARDLY DIMINISHING CONCENTRATION IN THE NEIGHBORHOOD OF THE SURFACE ONLY OF THE SAID PRE-FORMED POWDER, OF THE CHEMICAL FORMED BY SAID INTERACTION.
Claim 2
Independent Claim
70 words
A METHOD OF EFFECTING THE SURFACE MODERATION OF A PRE-FORMED DOUBLE BASE SMOKELESS PROPELLENT POWDER CONTAINING CHEMICALLY UNCOMBINED NITROGUANIDINE WHICH COMPRISES TREATING THE PRE-FORMED POWDER SURFACE WITH SYMMETRICAL DIETHYL DIPHENYL UREA IN A QUANTITY SUFFICIENT TO FORM IN SITU BY INTERACTION WITH THE SAID NITROGUANIDINE A ZONE OF INWARDLY DIMINISHING CONCENTRATION IN THE NEIGHBORHOOD OF THE SURFACE ONLY OF THE SAID PRE-FORMED POWDER, OF THE CHEMICAL FORMED BY SAID INTERACTION.
Claim 3
Dependent Claim
47 words
A SURFACE MODERATED DOUBLE BASE SMOKELESS PROPELLENT POWDER CONTAINING CHEMICALLY UNCOMBINED NITROGUANIDINE CHARACTERISED IN THAT IT HAS IN THE NEIGHBORHOOD OF ITS SURFACE ONLY A ZONE OF INWARDLY DIMINISHING CONCENTRATION OF THE CHEMICAL COMPLEX FORMED IN SITU BY INTERACTION OF SAID NITROGUANIDINE AND SYMMETRICAL DIETHYL DIPHENYL UREA.
Claim 4
Dependent Claim
47 words
A SURFACE MODERATED DOUBLE BASE SMOKELESS PROPELLENT POWDER CONTAINING CHEMICALLY UNCOMBINED NITROGUANIDINE CHARACTERISED IN THAT IT HAS IN THE NEIGHBORHOOD OF ITS SURFACE ONLY A ZONE OF INWARDLY DIMINISHING CONCENTRATION OF THE CHEMICAL COMPLEX FORMED IN SITU BY INTERACTION OF SAID NITROGUANIDINE AND SYMMETRICAL DIETHYL DIPHENYL UREA.
References Cited (Backward Citations)
US899855A
Cited
US1454414A
Cited
GB322427A
Cited
US2003914A
Cited
US2113418A
Cited
US2440267A
Cited
US2379056A
Cited
GB621699A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |