US2588086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speaker and heater unit for drive-in theaters
Assignee: Individual
•
Filing: 1949-03-12
•
Granted: 1952-03-04
•
Expires: 1969-03-12
Abstract
No abstract record available.
Inventors
- 👤 Maurice S Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:02
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405; A; A63; A63J; A63J5/00; A63J5/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1685345A
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US1722824A
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US1952514A
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US2091594A
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US2529425A
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US2463339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |