US3023140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulp bleaching
Assignee: FMC Corp
•
Filing: 1958-11-24
•
Granted: 1962-02-27
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Expires: 1978-11-24
Abstract
No abstract record available.
Inventors
- 👤 Clinton K Textor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:53
CPC Classifications
D; D21; D21B; D21B1/00; D21B1/04; D21B1/12; D21B1/14; D21B1/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
27 words
A PROCESS FOR PRODUCING BLEACH PULP FROM WOOD CHIPS INCLUDING THE STEPS OF PASSING RAW WOOD CHIPS IN A FLUID THROUGH A STAGED REFINER SYSTEM, CHARACTERIZED BY
References Cited (Backward Citations)
US1850832A
Cited
US1775405A
Cited
US2125634A
Cited
US2187016A
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US2435566A
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US2413583A
Cited
US2465738A
Cited
US2492047A
Cited
US2707144A
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US2717195A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |