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US3849923A Expired / Lapsed US ⏱️ 0.0 years remaining

Desiccating cartridge for firearm barrels

Assignee: Individual
•
Filing: 1973-11-12
•
Granted: 1974-11-26
•
Expires: 1993-11-12
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Abstract

Abstract A cartridge-shaped container is provided which contains desiccating material, and which serves to prevent corrosion within the barrel of the firearm. The cartridge is insertable into the firing chamber of the firearm, and it contains molecular sieve adsorbent pellets which adsorb the moisture present in the bore of the barrel, so as to prevent rust and other forms of corrosion due to moisture within the barrel. An impervious plug is provided having a hollow end which fits over the end of the cartridge in friction fit with the cartridge to preserve the integrity of the molecular sieve pellets when the cartridge is not in use, and the other end of the plug is dimensioned to be insertable into the muzzle of the firearm to seal and enclose the bore of the barrel when the cartridge is in place in the firing chamber. The molecular sieve pellets within the cartridge may take the form of synthetically produced crystalline metal aluminol-silicates which have a strong affinity for water and certain other gases and liquids.

Inventors

  • 👤 E Hawkins

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 19:16
CPC Classifications
F; F42; F42B; F42B5/00; F42B5/02; F42B5/24; F41; F41A; F41A29/00; F41A35/00; F41A35/02; F41A35/04

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 114 words
A desiccant cartridge for use in a firearm, said firearm having a firing chamber, a firing pin, a muzzle, and a barrel having a bore therein, said cartridge being insertable into the firing chamber of the firearm, said cartridge including: a hollow shell case having a porous forward wall; a quantity of molecular sieve adsorbent material contained in said hollow shell case; and a removable impervious plug having a hollow end portion dimensioned to extend coaxially over the forward end of said shell case in friction fit therewith, and having a closed end portion dimensioned to be inserted into the muzzle of the firearm as a closure for the bore of the barrel thereof.
Claim 2
Dependent Claim 114 words
A desiccant cartridge for use in a firearm, said firearm having a firing chamber, a firing pin, a muzzle, and a barrel having a bore therein, said cartridge being insertable into the firing chamber of the firearm, said cartridge including: a hollow shell case having a porous forward wall; a quantity of molecular sieve adsorbent material contained in said hollow shell case; and a removable impervious plug having a hollow end portion dimensioned to extend coaxially over the forward end of said shell case in friction fit therewith, and having a closed end portion dimensioned to be inserted into the muzzle of the firearm as a closure for the bore of the barrel thereof.
Claim 3
Dependent Claim 19 words
The cartridge defined in claim 1, in which said molecular sieve adsorbent material is in the form of pellets.
Claim 4
Dependent Claim 35 words
The cartridge defined in claim 1, in which said shell case is formed of transparent material, and which includes a quantity of moisture indicating pellets contained in the case interspersed with said molecular sieve material.
Claim 5
Dependent Claim 42 words
The cartridge defined in claim 1, and which includes a cap base mounted on the rear end of said shell case, and a buffering pad of high density plastic material mounted on said cap for receiving the firing pin of the firearm.
Claim 6
Dependent Claim 33 words
The cartridge defined in claim 1, and which includes a ribbon mounted in the plug to extend out of the end thereof when the plug is inserted into the muzzle of the firearm.

References Cited (Backward Citations)

US2465163A Cited
GB596261A Cited
US2557277A Cited
US2594778A Cited
FR1022043A Cited
US2985979A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-11-25 1978-05-27 1978-11-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-11-25 1982-05-27 1982-11-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-11-25 1986-05-27 1986-11-26 $7700.00 Window Closed / Lapsed

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