US2880471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound insulating structures
Assignee: Individual
•
Filing: 1957-02-20
•
Granted: 1959-04-07
•
Expires: 1977-02-20
Abstract
No abstract record available.
Inventors
- 👤 Munchhausen Heyno Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:41
CPC Classifications
E; E06; E06B; E06B5/00; E06B5/20; E06B3/00; E06B3/70; E06B3/82; E06B3/822; E06B3/825; E06B3/7015; E06B2003/7025; E06B2003/7059; E06B2003/7061; E06B2003/7067
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) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |