US3877374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective coating for caseless ammunition
Assignee: Olin Corp
•
Filing: 1973-07-12
•
Granted: 1975-04-15
•
Expires: 1993-07-12
Abstract
Abstract The propellant charge of a round of caseless ammunition is provided with a one or more layer coating of microcapsules containing silicone oil or the like to reduce transfer of external heat to the propellant.
Inventors
- 👤 Ralph L Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:14
CPC Classifications
F; F42; F42B; F42B5/00; F42B5/02; F42B5/24; F42B5/16; F42B5/18; F42B5/192; F42B5/196; Y; Y10; Y10S; Y10S102/00; Y10S102/70; Y10S102/704
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
41 words
IN A ROUND OF CASELESS AMMUNITION COMPRISING A PROJECTILE AND A COMPACTED CHARGE OF PROPELLANT,THE IMPROVEMENT COMPRISING A PROTECTIVE COATING COMPRISING AT LEAST ONE LAYER OF MICROENCAPSULATED VAPORIZABLE LOW HEAT TRANSFER LIQUID ADHERED TO THE OUTER SURFACE OF THE PROPELLANT CHARGE.
Claim 2
Dependent Claim
41 words
IN A ROUND OF CASELESS AMMUNITION COMPRISING A PROJECTILE AND A COMPACTED CHARGE OF PROPELLANT,THE IMPROVEMENT COMPRISING A PROTECTIVE COATING COMPRISING AT LEAST ONE LAYER OF MICROENCAPSULATED VAPORIZABLE LOW HEAT TRANSFER LIQUID ADHERED TO THE OUTER SURFACE OF THE PROPELLANT CHARGE.
Claim 3
Dependent Claim
45 words
A round of caseless ammunition comprising a projectile, a compacted charge of propellant secured to said projectile, and a protective coating secured to an external surface of said propellant charge, said protective coating comprising a plurality of microcapsules of a vaporizable low heat transfer liquid.
Claim 4
Dependent Claim
45 words
A round of caseless ammunition comprising a projectile, a compacted charge of propellant secured to said projectile, and a protective coating secured to an external surface of said propellant charge, said protective coating comprising a plurality of microcapsules of a vaporizable low heat transfer liquid.
Claim 5
Dependent Claim
42 words
A round of caseless ammunition comprising a projectile, a compacted charge of propellant secured to said projectile, and a protective coating secured to said propellant charge, said protective coating comprising a Plurality of microcapsules of silicone oil encased in an encapsulating material.
Claim 6
Dependent Claim
42 words
A round of caseless ammunition comprising a projectile, a compacted charge of propellant secured to said projectile, and a protective coating secured to said propellant charge, said protective coating comprising a Plurality of microcapsules of silicone oil encased in an encapsulating material.
Claim 7
Dependent Claim
22 words
The round of ammunition of claim 3, wherein said encapsulating material is selected from the group consisting of gelatin and polyvinyl alcohol.
Claim 8
Dependent Claim
33 words
A compacted charge of propellant material having a protective coating adhered to an external surface of said charge, said protective coating comprising a plurality of microcapsules of a vaporizable low heat transfer liquid.
Claim 9
Dependent Claim
33 words
A compacted charge of propellant material having a protective coating adhered to an external surface of said charge, said protective coating comprising a plurality of microcapsules of a vaporizable low heat transfer liquid.
Claim 10
Dependent Claim
12 words
The propellant charge of claim 5, wherein said liquid is silicone oil.
References Cited (Backward Citations)
US1187779A
Cited
US1865157A
Cited
US2800457A
Cited
US3120184A
Cited
US3727512A
Cited
US3747532A
Cited
US3730094A
Cited
US3703868A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |