US2675581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing insulated resistor shells
Assignee: Speer Carbon Co
•
Filing: 1951-08-13
•
Granted: 1954-04-20
•
Expires: 1971-08-13
Abstract
No abstract record available.
Inventors
- 👤 William M Payne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:39
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/02; B30B11/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US813209A
Cited
US1143034A
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US1839056A
Cited
US1904864A
Cited
US2127994A
Cited
US2398227A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |