US3428473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Space vehicle
Assignee: Engelhard Minerals and Chemicals Corp
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Filing: 1964-08-06
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Granted: 1969-02-18
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Expires: 1984-08-06
Abstract
No abstract record available.
Inventors
- 👤 Robert C Langley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:15
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/3602; C03C17/3605; B; B64; B64G; B64G1/00; B64G1/22; B64G1/52; B64G1/54; C03C17/02; C03C17/3644; C03C17/3649; C03C17/3657; C03C17/366; C03C17/3681; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/24926; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |