US3462899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wooden dual panel sound insulating structures
Assignee: PHILIP E SHERMAN
•
Filing: 1968-02-26
•
Granted: 1969-08-26
•
Expires: 1988-02-26
Abstract
No abstract record available.
Inventors
- 👤 Philip E Sherman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:38
CPC Classifications
E; E06; E06B; E06B5/00; E06B5/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2880471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |