Patent US3487539A successfully refreshed from Google Patents.
US3487539A
Expired / Lapsed
US
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Method of manufacturing flanged waveguides
Assignee: General Dynamics Corp
•
Filing: 1964-09-29
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Granted: 1970-01-06
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Expires: 1984-09-29
Abstract
No abstract record available.
Inventors
- 👤 William P Dugan
- 👤 William L Mac-Turk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:14
CPC Classifications
H; H01; H01P; H01P11/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49016; Y10T29/4998; Y10T29/49982; Y10T29/49984
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) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |