US2553649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave guide regulator
Assignee: Individual
•
Filing: 1947-08-05
•
Granted: 1951-05-22
•
Expires: 1967-08-05
Abstract
No abstract record available.
Inventors
- 👤 Richard G Garfitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:11
CPC Classifications
H; H01; H01P; H01P1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1877008A
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US2129712A
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US2294942A
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US2396044A
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US2502456A
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US2505534A
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US2368701A
Cited
US2405049A
Cited
US2441598A
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US2431103A
Cited
US2480189A
Cited
US2442614A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |