US3436265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure gradient web cleaning method
Assignee: Individual
•
Filing: 1965-01-08
•
Granted: 1969-04-01
•
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 03:12
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1196437A
Cited
US1658485A
Cited
US2022593A
Cited
US2139628A
Cited
US2358334A
Cited
US2482781A
Cited
US2515223A
Cited
US2648089A
Cited
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 |