US3438352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming and/or augmenting an energy wave
Assignee: Individual
•
Filing: 1962-06-29
•
Granted: 1969-04-15
•
Expires: 1982-06-29
Abstract
No abstract record available.
Inventors
- 👤 Clarence W Brandon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:37
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/003; E21B28/00; E21B36/00; E21B36/001; F; F04; F04B; F04B37/00; F04B37/10; Y; Y10; Y10S; Y10S116/00; Y10S116/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1117444A
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US1747011A
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US3016893A
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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) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |