US3535453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for synthesizing auditorium sound
Assignee: Individual
•
Filing: 1967-05-15
•
Granted: 1970-10-20
•
Expires: 1987-05-15
Abstract
No abstract record available.
Inventors
- 👤 Paul S Veneklasen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:26
CPC Classifications
G; G10; G10K; G10K15/00; G10K15/08; G10K15/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3024309A
Cited
US2493638A
Cited
US2542663A
Cited
US2931862A
Cited
US3400340A
Cited
US3309628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |