Patent US2629295A successfully refreshed from Google Patents.
US2629295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making paper
Assignee: Eastman Kodak Co
•
Filing: 1945-06-15
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Granted: 1953-02-24
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Expires: 1965-06-15
Abstract
No abstract record available.
Inventors
- 👤 George A Richter
- 👤 Robert H Macclaren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:18
CPC Classifications
D; D21; D21B; D21B1/00; D21B1/04; D21B1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A METHOD OF PREPARING PAPER WHICH CONSISTS IN TRANSVERSELY CUTTING A DRY SHEET OF CONIFEROUS WOOD PULP, THE FIBERS OF WHICH MAINLY RUN LENGTHWISE, AT INTERVALS OF APPROXIMATELY 1/32 OF AN INCH, THEREBY FORMING CHIPS OF THE APPROXIMATE WIDTH, AGITATING THE CHIPS IN WATER TO DISPERSE THE PULP FIBERS THEREIN AND TO FROM A SUSPENSION HAVING A SLOWNESS OF 5-100 SECONDS BY THE WILLIAMS FREENESS TEST; PROVIDING THE SUSPENSION WITH SIZING CHEMICALS AND PREPARING PAPER FROM THE PULP SUSPENSION WHILE MAINTAINING THE SLOWNESS WITHIN 5-100 SECONDS WHEREBY PAPER OF GOOD FLATNESS, LOW WET EXPANSION AND UNIFORMLY FORMATION IS OBTAINED.
Claim 2
Independent Claim
99 words
A METHOD OF PREPARING PAPER WHICH CONSISTS IN TRANSVERSELY CUTTING A DRY SHEET OF CONIFEROUS WOOD PULP, THE FIBERS OF WHICH MAINLY RUN LENGTHWISE, AT INTERVALS OF APPROXIMATELY 1/32 OF AN INCH, THEREBY FORMING CHIPS OF THE APPROXIMATE WIDTH, AGITATING THE CHIPS IN WATER TO DISPERSE THE PULP FIBERS THEREIN AND TO FROM A SUSPENSION HAVING A SLOWNESS OF 5-100 SECONDS BY THE WILLIAMS FREENESS TEST; PROVIDING THE SUSPENSION WITH SIZING CHEMICALS AND PREPARING PAPER FROM THE PULP SUSPENSION WHILE MAINTAINING THE SLOWNESS WITHIN 5-100 SECONDS WHEREBY PAPER OF GOOD FLATNESS, LOW WET EXPANSION AND UNIFORMLY FORMATION IS OBTAINED.
References Cited (Backward Citations)
US1050367A
Cited
US1417961A
Cited
GB210166A
Cited
US1716006A
Cited
US1842689A
Cited
US1786538A
Cited
US1826825A
Cited
US1840399A
Cited
US1829763A
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US1959965A
Cited
US1838614A
Cited
US1980881A
Cited
US1944906A
Cited
US2028080A
Cited
US2054301A
Cited
US2065395A
Cited
US2345543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-24 | 1956-08-25 | 1957-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-24 | 1960-08-25 | 1961-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-24 | 1964-08-25 | 1965-02-24 | $7700.00 | Window Closed / Lapsed |