US3540116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a building panel
Assignee: Clestra SA
•
Filing: 1967-07-07
•
Granted: 1970-11-17
•
Expires: 1987-07-07
Abstract
No abstract record available.
Inventors
- 👤 Edward F Drahos
- 👤 Marvin D Merritt
- 👤 John A Bohnsack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:05
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/26; E04C2/28; Y; Y10; Y10T; Y10T156/00; Y10T156/17; Y10T156/1702; Y10T156/1744; Y10T156/1751; Y10T156/1761; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49828; Y10T29/49829; Y10T29/49906; Y10T29/49908; Y10T29/49915
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US648632A
Cited
US2219805A
Cited
US2576698A
Cited
US2752672A
Cited
US3003902A
Cited
US3139369A
Cited
US3344503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |