Patent US2850828A successfully refreshed from Google Patents.
US2850828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum alloy gun barrel with a lubricating film
Assignee: Individual
•
Filing: 1953-03-24
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Granted: 1958-09-09
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Expires: 1973-03-24
Abstract
No abstract record available.
Inventors
- 👤 George C Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:44
CPC Classifications
F; F41; F41A; F41A21/00; F41A21/24; F41A21/02; F41A21/04; F41A21/12; F41A21/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
85 words
A FIREARM BARREL MADE OF LIGHT WEIGHT, HIGH THERMAL CONDUCTIVITY ALUMINUM ALLOY HAVING UPON AT LEAST ITS BORE SURFACE, A LAYER OF POROUS MATERIAL, AND A SUBSTANTIALLY PERMANENT DRY BAKED LUBRICATING FILM UPON SAID POROUS LAYER WHICH EXTENDS INTO THE PORES OF SAID POROUS LAYER, SAID DRY BAKED LUBRICATING FILM COMPRISING APPROXIMATELY 225 PARTS BY WEIGHT OF BINDER, APPROXIMATELY 225 PARTS BY WEIGHT OF LOMYBDENUM DISULFIDE, AND APPROXIMATELY 25 PARTS BY WEIGHT OF GRAPHITE, SAID FILM HAVING A THICKNESS OF FROM 1/8 TO 1/2 MIL.
References Cited (Backward Citations)
US2736119A
Cited
US1207218A
Cited
US1346190A
Cited
US2104319A
Cited
US2156803A
Cited
FR831030A
Cited
US2395044A
Cited
US2361211A
Cited
US2413022A
Cited
US2440634A
Cited
US2466642A
Cited
US2543741A
Cited
US2686155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |