Patent US3501878A successfully refreshed from Google Patents.
US3501878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound and heat insulating panels
Assignee: Individual
•
Filing: 1967-05-22
•
Granted: 1970-03-24
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Expires: 1987-05-22
Abstract
No abstract record available.
Inventors
- 👤 Charles Segal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:23
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04C; E04C2/00; E04C2/30; E04C2/32; E04D; E04D13/00; E04D13/17; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24661
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-23 | 1973-09-22 | 1974-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-23 | 1977-09-22 | 1978-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-23 | 1981-09-22 | 1982-03-24 | $7700.00 | Window Closed / Lapsed |