US3772812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sub-caliber conversion unit
Assignee: Individual
•
Filing: 1973-03-26
•
Granted: 1973-11-20
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Expires: 1993-03-26
Abstract
Abstract A sub-caliber conversion unit adapted to be detachably secured to and firmly supported by the lower receiver group of a larger caliber pistol, wherein the slide in such conversion unit operates independently of the barrel, and means are provided to permit full travel of said slide.
Inventors
- 👤 R Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:12
CPC Classifications
F; F41; F41A; F41A15/00; F41A15/12; F41A11/00; F41A11/02; F41A21/00; F41A21/10; F41A9/00; F41A9/61; F41A9/64; F41A9/65; F41A9/71
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
In combination with a magazine of a larger caliber firearm comprising spaced sides, front, back, base, spring activated follower, and a slot in a selected portion of said magazine, a sub-caliber magazine insert adapted to be positioned in said larger caliber magazine comprising spaced sides, front, back, spring activated follower, and means on said sub-caliber magazine insert adapted to engage a selected portion of said slot in said larger caliber firearm.
Claim 2
Dependent Claim
71 words
In combination with a magazine of a larger caliber firearm comprising spaced sides, front, back, base, spring activated follower, and a slot in a selected portion of said magazine, a sub-caliber magazine insert adapted to be positioned in said larger caliber magazine comprising spaced sides, front, back, spring activated follower, and means on said sub-caliber magazine insert adapted to engage a selected portion of said slot in said larger caliber firearm.
Claim 3
Dependent Claim
13 words
The invention of claim 1 wherein said slot is the magazine catch slot.
Claim 4
Dependent Claim
23 words
The invention of claim 2 wherein said means comprises a lip which partially inserts into the rearmost portion of said magazine catch slot.
Claim 5
Dependent Claim
27 words
The invention of claim 1 further including means on at least said back of said sub-caliber magazine insert to position said insert in the larger caliber magazine.
Claim 6
Dependent Claim
21 words
The invention of claim 1 wherein an ejector is integrally formed on at least one side of said sub-caliber magazine insert.
Claim 7
Dependent Claim
72 words
In combination with a magazine of a larger caliber firearm comprising spaced sides, front, back, base and spring activated follower, a sub-caliber magazine adapted to insert in said larger caliber magazine comprising spaced sides, front, back and spring activated follower, means on said sub-caliber magazine to position said sub-caliber magazine in said larger caliber magazine, and means on said sub-caliber magazine adapted to secure said sub-caliber magazine in said larger caliber magazine.
Claim 8
Dependent Claim
72 words
In combination with a magazine of a larger caliber firearm comprising spaced sides, front, back, base and spring activated follower, a sub-caliber magazine adapted to insert in said larger caliber magazine comprising spaced sides, front, back and spring activated follower, means on said sub-caliber magazine to position said sub-caliber magazine in said larger caliber magazine, and means on said sub-caliber magazine adapted to secure said sub-caliber magazine in said larger caliber magazine.
References Cited (Backward Citations)
US1407633A
Cited
US1563675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |