Patent US3032136A successfully refreshed from Google Patents.
US3032136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loudspeaker
Assignee: Individual
•
Filing: 1956-09-27
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Granted: 1962-05-01
•
Expires: 1976-09-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Andrew Stewart Hegeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:04
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/32; H04R1/34; H04R1/345; H04R7/00; H04R7/02; H04R7/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1859921A
Cited
US1624357A
Cited
FR567539A
Cited
US1690840A
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US1648226A
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US1743194A
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US1767679A
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US1760252A
Cited
GB313282A
Cited
US1846351A
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US1997790A
Cited
US2124597A
Cited
US2115924A
Cited
US2271100A
Cited
US2638509A
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US2706529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-30 | 1965-10-30 | 1966-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-30 | 1969-10-30 | 1970-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-30 | 1973-10-30 | 1974-05-01 | $7700.00 | Window Closed / Lapsed |