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Patent US3451841A successfully refreshed from Google Patents.
US3451841A
Expired / Lapsed
US
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Ceramic foam
Assignee: Motors Liquidation Co
•
Filing: 1965-10-22
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Granted: 1969-06-24
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Patrick N Kesten
- 👤 Karl Schwartzwalder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:42
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C03; C03C; C03C10/00; C03C10/0054; C03C11/00; C03C11/007; C04B41/45; C04B41/50; C04B41/5022; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249967; Y10T428/249969; Y10T428/24997; Y10T428/26; Y10T428/263; Y10T428/264
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2681865A
Cited
US2920971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |