Patent US3362818A successfully refreshed from Google Patents.
US3362818A
Expired / Lapsed
US
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Fabrication of poly porosity microstructures
Assignee: Boeing North American Inc
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Filing: 1967-01-05
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Granted: 1968-01-09
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Expires: 1987-01-05
Abstract
No abstract record available.
Inventors
- 👤 Schwarzkopf Peter
- 👤 Dalton A Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:10
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F3/1121; C; C04; C04B; C04B38/00; B22F2998/00; B22F2998/10
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) | 1971-01-08 | 1971-07-10 | 1972-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-08 | 1975-07-10 | 1976-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-08 | 1979-07-10 | 1980-01-09 | $7700.00 | Window Closed / Lapsed |