US3453137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper machinery
Assignee: Black Clawson Co
•
Filing: 1965-10-05
•
Granted: 1969-07-01
•
Expires: 1985-10-05
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Penkala
- 👤 Jean-Pierre Escarfail
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:22
CPC Classifications
D; D21; D21H; D21H25/00; D21H25/08; D21H5/00; D21H5/0005; D21H5/006; D21H5/0062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2251264A
Cited
US2772655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |