US2629295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making paper
Assignee: Eastman Kodak Co
•
Filing: 1945-06-15
•
Granted: 1953-02-24
•
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
2026-10-25 09:30
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.
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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 |