Patent US4692745A successfully refreshed from Google Patents.
Patent US2992911A successfully refreshed from Google Patents.
US2992911A
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Process for preparing rocket fuel containing polymerized olefins and boron
Assignee: Imperial Chemical Industries Ltd
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Filing: 1950-08-16
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Granted: 1961-07-18
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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 17:49
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.
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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 |