US2800291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid boundary surface for contact with a relatively moving fluid medium
Assignee: Individual
•
Filing: 1951-10-20
•
Granted: 1957-07-23
•
Expires: 1971-10-20
Abstract
No abstract record available.
Inventors
- 👤 Stephens Arthur Veryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:07
CPC Classifications
B; B64; B64C; B64C21/00; B64C21/10; B62; B62D; B62D35/00; B64C23/00; B64C23/06; B64C2230/00; B64C2230/26; Y; Y02; Y02T; Y02T50/00; Y02T50/10; Y02T70/00; Y02T70/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1454479A
Cited
US1719293A
Cited
US1773281A
Cited
US1744663A
Cited
GB357637A
Cited
US1879618A
Cited
FR794841A
Cited
US2272358A
Cited
US2471768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |