US3779820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propellent charge comprising nitrocellulose
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1972-08-21
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Granted: 1973-12-18
•
Expires: 1992-08-21
Abstract
Abstract A dry compacted Caseless Propellant Charge comprising in addition to the usual constituents of a propellant explosive, a proportion of nitrocellulose having an average nitrogen content of 11.0 to 12.0 percent by weight.
Inventors
- 👤 Stevely R Reid
- 👤 Webster W Snodgrass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:31
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0091; C06B25/00; C06B25/18; Y; Y10; Y10S; Y10S102/00; Y10S102/70
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
22 words
A propellant charge as claimed in claim 1 formed with a surface indent to accommodate an appropriate quantity of a priming composition.
Claim 2
Dependent Claim
15 words
A propellant charge as claimed in claim 2 wherein the surface indent contains priming composition.
Claim 3
Dependent Claim
15 words
A propellant charge as claimed in claim 3 wherein the priming composition comprises lead styphnate.
Claim 4
Dependent Claim
31 words
A method of making a unitary caseless propellant charge which method comprises dry compacting grains of the composition of claim 1 at pressures in the range of 30,000 to 70,000 psi.
Claim 5
Dependent Claim
13 words
A method as claimed in claim 5 wherein the propellant grains are porous.
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |