US3494231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a facet of a multifacet paraboloidal collimator
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1967-07-26
•
Granted: 1970-02-10
•
Expires: 1987-07-26
Abstract
No abstract record available.
Inventors
- 👤 Allan D Le Vantine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:17
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/08; G02B5/09; G02B27/00; G02B27/30; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0405; Y10T83/0419; Y10T83/343
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2384638A
Cited
US3186271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |