US3461632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightweight cellular structural material
Assignee: ROBERT G KUHNE
•
Filing: 1965-10-18
•
Granted: 1969-08-19
•
Expires: 1985-10-18
Abstract
No abstract record available.
Inventors
- 👤 Robert G Kuhne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:56
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; B; B64; B64C; B64C3/00; Y; Y10; Y10T; Y10T428/00; Y10T428/16; Y10T428/163; Y10T428/164; Y10T428/24; Y10T428/24149; Y10T428/24628; Y10T428/24661
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3025935A
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FR1206081A
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US3071216A
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US2988959A
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US3024879A
Cited
US3108924A
Cited
US3011602A
Cited
US3142599A
Cited
US3151712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-18 | 1973-02-17 | 1973-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-18 | 1977-02-17 | 1977-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-18 | 1981-02-17 | 1981-08-19 | $7700.00 | Window Closed / Lapsed |