Patent US3436265A successfully refreshed from Google Patents.
US3436265A
Expired / Lapsed
US
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Pressure gradient web cleaning method
Assignee: Individual
•
Filing: 1965-01-08
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Granted: 1969-04-01
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Expires: 1985-01-08
Abstract
No abstract record available.
Inventors
- 👤 Thomas A Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:28
CPC Classifications
B; B41; B41F; B41F23/00; B41F23/002; B08; B08B; B08B5/00; B08B5/02; B08B5/023; B08B5/026; B08B6/00; D; D21; D21F; D21F5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2358334A
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Cited
US2515223A
Cited
US2648089A
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GB732972A
Cited
US3045273A
Cited
US2956301A
Cited
US2920987A
Cited
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 |