Patent US2997451A successfully refreshed from Google Patents.
US2997451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conductive phonograph record containing thermoplastic resin and carbon black
Assignee: Individual
•
Filing: 1957-03-07
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Granted: 1961-08-22
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Expires: 1977-03-07
Abstract
No abstract record available.
Inventors
- 👤 Harry B Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:05
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; G; G11; G11B; G11B3/00; G11B3/68; G11B3/70; G11B5/00; G11B5/62; G11B5/68; G11B5/70; H; H04; H04N; H04N5/00; H04N5/76; C08J2300/00; C08J2300/22; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |