Patent US3435654A successfully refreshed from Google Patents.
US3435654A
Expired / Lapsed
US
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Boundary layer control
Assignee: Individual
•
Filing: 1966-03-16
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Granted: 1969-04-01
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Expires: 1986-03-16
Abstract
No abstract record available.
Inventors
- 👤 Hermann Papst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:00
CPC Classifications
B; B21; B21D; B21D13/00; B21D13/02; B60; B60K; B60K11/00; B60K11/08; B62; B62D; B62D31/00; B62D31/02; B62D35/00; B62D37/00; B63; B63B; B63B1/00; B63B1/32; B63B1/34; B64; B64C; B64C21/00; B64C21/02; B64C21/06; F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/141; F01D5/145; F02; F02K; F02K1/00; F02K1/78; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/30; F04D29/32; F04D29/321; F04D29/324; F04D29/66; F04D29/68; F04D29/681; F04D29/682; B64C2230/00; B64C2230/04; Y; Y02; Y02T; Y02T50/00; Y02T50/10; Y02T50/60; Y02T70/00; Y02T70/10; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/496
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) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |