Patent US2216345A successfully refreshed from Google Patents.
Patent US3666688A successfully refreshed from Google Patents.
US3666688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tamping material
Assignee: Airco Inc
•
Filing: 1970-04-01
•
Granted: 1972-05-30
•
Expires: 1990-04-01
Abstract
Abstract A tamping material for securing electrical connections to carbon blocks comprises finely divided granules composed of 85 percent to 97 percent by weight graphite and 15 to 3 percent by weight resin binder.
Inventors
- 👤 William Eugene Mccafferty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:56
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/36; H01B; H01B1/00; H01B1/20; H01B1/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A tamping material as in claim 1 wherein the size of said granules is in the range -20 mesh to +115 mesh.
Claim 2
Dependent Claim
15 words
A tamping material as in claim 1 in which the graphite particles are silver coated.
References Cited (Backward Citations)
US2397082A
Cited
US2731371A
Cited
US3003975A
Cited
US3334040A
Cited
US3440181A
Cited
US3389200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |