US3420710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for cleaning webs utilizing a sonic air blast
Assignee: EIDP Inc
•
Filing: 1964-09-03
•
Granted: 1969-01-07
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Expires: 1984-09-03
Abstract
No abstract record available.
Inventors
- 👤 Henry Thomas Wollman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:42
CPC Classifications
G; G03; G03D; G03D15/00; B; B08; B08B; B08B5/00; B08B5/02; B08B5/023; B08B5/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3239863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |