Patent US3187633A successfully refreshed from Google Patents.
US3187633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contra-jet muzzle brake for firearms
Assignee: Individual
•
Filing: 1963-11-12
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Granted: 1965-06-08
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Expires: 1983-11-12
Abstract
No abstract record available.
Inventors
- 👤 David S Tanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:55
CPC Classifications
F; F41; F41A; F41A21/00; F41A21/32; F41A21/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A MUZZLE BRAKE FOR FIREARMS, COMPRISING A BARREL ELEMENT HAVING THEREIN A PLURALITY OF GAS EJECTION SLOTS ARRANGED IN PAIRS, EACH OF WHICH SLOTS, AT EACH LOCATION THROUGHOUT ITS LENGTH, IS INCLINED RELATIVE TO A RADIUS OF THE BARREL AT SUCH LOCATION, AND THE SLOTS OF EACH PAIR OF BEING INCLINED OPPOSITELY RELATIVE TO EACH OTHER AS TO BE CONVERGENT TOWARD THE EXTERIOR OF SAID BARREL ELEMENT.
Claim 2
Dependent Claim
67 words
A MUZZLE BRAKE FOR FIREARMS, COMPRISING A BARREL ELEMENT HAVING THEREIN A PLURALITY OF GAS EJECTION SLOTS ARRANGED IN PAIRS, EACH OF WHICH SLOTS, AT EACH LOCATION THROUGHOUT ITS LENGTH, IS INCLINED RELATIVE TO A RADIUS OF THE BARREL AT SUCH LOCATION, AND THE SLOTS OF EACH PAIR OF BEING INCLINED OPPOSITELY RELATIVE TO EACH OTHER AS TO BE CONVERGENT TOWARD THE EXTERIOR OF SAID BARREL ELEMENT.
References Cited (Backward Citations)
DE214226C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |