US3062699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for modifying cellulosic materials and product thereof
Assignee: Spaulding Fibre Co Inc
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Filing: 1960-06-28
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Granted: 1962-11-06
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Expires: 1980-06-28
Abstract
No abstract record available.
Inventors
- 👤 Raphael Thomas
- 👤 Richard E Merrill
- 👤 Jr William Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:28
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/48; D21H17/49; D21H17/51; D21H23/00; D21H23/76; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31964; Y10T428/31967
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
69 words
PROCESS FOR FORMING A CELLULOSIC SHEET FROM A WATER SLURRY, COMPRISING THE STEPS OF FORMING A STOCK OF CELLULOSE FIBERS, ADDING TO SAID STOCK FROM 5 TO 30% BY DRY FIBER WEIGHT OF A PHENOLIC RESIN, FROM 2 TO 10% BY WEIGHT OF A UREA-FORMALDEHYDE RESIN AND UP TO 3.0% OF AN ELASTOMERIC MATERIAL, FORMING PAPER FROM STOCK, DRYING THE RESULTING PAPER, TREATING SAID PAPER WITH A CONCENTRATED SOLUTION
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |