US2672075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for treating paper mill waste
Assignee: Individual
•
Filing: 1950-02-20
•
Granted: 1954-03-16
•
Expires: 1970-02-20
Abstract
No abstract record available.
Inventors
- 👤 Fraser Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:09
CPC Classifications
D; D21; D21D; D21D1/00; D21D1/20; D21D1/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US785025A
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US879440A
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US1039941A
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US1287439A
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US1515336A
Cited
US1556926A
Cited
GB313611A
Cited
DE653505C
Cited
US2294060A
Cited
US2424726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |