Patent US3384464A successfully refreshed from Google Patents.
US3384464A
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US
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Tungsten structures
Assignee: Duracell Inc USA
•
Filing: 1967-03-06
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Granted: 1968-05-21
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Expires: 1987-03-06
Abstract
No abstract record available.
Inventors
- 👤 Richard H Krock
- 👤 Edward J Zdanuk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:45
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/24; B22F3/26; H; H01; H01H; H01H1/00; H01H1/02; H01H1/0203; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12042; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/1284; Y10T428/12861; Y10T428/12903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB661031A
Cited
US2669008A
Cited
US2845346A
Cited
US2922721A
Cited
US3022187A
Cited
US3285714A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |