Patent US4733633A successfully refreshed from Google Patents.
Patent US3017971A successfully refreshed from Google Patents.
US3017971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellular cored panels and continuous process for manufacturing same
Assignee: Formacel Inc
•
Filing: 1958-03-24
•
Granted: 1962-01-23
•
Expires: 1978-03-24
Abstract
No abstract record available.
Inventors
- 👤 Charles W Christman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:07
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; E04C2/365; B; B21; B21D; B21D47/00; B64; B64C; B64C3/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49879; Y10T428/00; Y10T428/12; Y10T428/1234; Y10T428/12347; Y10T428/12354; Y10T428/24; Y10T428/24149; Y10T428/24165
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US684822A
Cited
US2720949A
Cited
US2778458A
Cited
US2746139A
Cited
US2756496A
Cited
US2833682A
Cited
US2796157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-22 | 1965-07-24 | 1966-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-22 | 1969-07-24 | 1970-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-22 | 1973-07-24 | 1974-01-23 | $7700.00 | Window Closed / Lapsed |