US2434449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous pulper and selector
Assignee: Individual
•
Filing: 1943-09-20
•
Granted: 1948-01-13
•
Expires: 1963-09-20
Abstract
No abstract record available.
Inventors
- 👤 Wells Harold Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:11
CPC Classifications
D; D21; D21D; D21D1/00; D21D1/20; D21D1/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US522463A
Cited
US797970A
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US958862A
Cited
US1244144A
Cited
US1521469A
Cited
US2265936A
Cited
US2338904A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-12 | 1951-07-14 | 1952-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-12 | 1955-07-14 | 1956-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-12 | 1959-07-14 | 1960-01-13 | $7700.00 | Window Closed / Lapsed |