US3452836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustical chair
Assignee: EDMUND M DI GIULIO
•
Filing: 1967-04-17
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Granted: 1969-07-01
•
Expires: 1987-04-17
Abstract
No abstract record available.
Inventors
- 👤 Anthony J Carsello
- 👤 Edmund M Di Giulio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:13
CPC Classifications
H; H04; H04R; H04R5/00; H04R5/02; H04R5/023; A; A47; A47C; A47C7/00; A47C7/62; A47C7/72; A47C7/727
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) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |