Patent US3877374A successfully refreshed from Google Patents.
US3877374A
Expired / Lapsed
US
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Protective coating for caseless ammunition
Assignee: Olin Corp
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Filing: 1973-07-12
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Granted: 1975-04-15
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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 12:02
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.
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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) | 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 |