US2680734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper treating resin
Assignee: Honeywell International Inc
•
Filing: 1950-01-26
•
Granted: 1954-06-08
•
Expires: 1970-01-26
Abstract
No abstract record available.
Inventors
- 👤 William C Dearing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:42
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/49; D21H17/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A PAPER TREATING RESIN OF IMPROVED STABILITY AND SOLUBILITY IN DILUTE AQUEOUS SOLUTION THAT IS CAPABLE OF IMPARTING SUPERIOR WET STRENGTH TO PAPER, COMPRISING A WATER-SOLUBLE INTERMEDIATE CONDENSATION PRODUCT OF (A) FORMALDEHYDE, (D) UREA, SAID FORMALDEHYDE AND UREA BEING IN A PROPORTION OF ONE MOL OF UREA FOR EACH 1.9-2.15 MOLS OF FORMALDEHYDE, (C) AN ALKALI METAL SALT OF GLYCOLIC ACID, SAID ALKALI METAL SALT OF GLYCOLIC ACID BEING IN A PROPORTION OF 0.15-0.25 MOL FOR EACH MOL OF UREA, SAID (D) A POLYHYDRIC ALCOHOL OF THE CLASS CONSISTING OF POLYHYDROXY ALKANES AND LINEAR ETHERS THEREOF WHOSE MOLECULE HAS FROM 2-10 ATOMS, HAS NOT MORE THAN TWO CARBON ATOMS PER HYDROXY GROUP AND HAS NO CONSTITUENTS OTHER THAN HYDROXY GROUP, SAID POLYHYDRIC ALCOHOL BEING 10-20% BY WEIGHT OF THE AMOUNT OF SAID UREA.
Claim 2
Dependent Claim
133 words
A PAPER TREATING RESIN OF IMPROVED STABILITY AND SOLUBILITY IN DILUTE AQUEOUS SOLUTION THAT IS CAPABLE OF IMPARTING SUPERIOR WET STRENGTH TO PAPER, COMPRISING A WATER-SOLUBLE INTERMEDIATE CONDENSATION PRODUCT OF (A) FORMALDEHYDE, (D) UREA, SAID FORMALDEHYDE AND UREA BEING IN A PROPORTION OF ONE MOL OF UREA FOR EACH 1.9-2.15 MOLS OF FORMALDEHYDE, (C) AN ALKALI METAL SALT OF GLYCOLIC ACID, SAID ALKALI METAL SALT OF GLYCOLIC ACID BEING IN A PROPORTION OF 0.15-0.25 MOL FOR EACH MOL OF UREA, SAID (D) A POLYHYDRIC ALCOHOL OF THE CLASS CONSISTING OF POLYHYDROXY ALKANES AND LINEAR ETHERS THEREOF WHOSE MOLECULE HAS FROM 2-10 ATOMS, HAS NOT MORE THAN TWO CARBON ATOMS PER HYDROXY GROUP AND HAS NO CONSTITUENTS OTHER THAN HYDROXY GROUP, SAID POLYHYDRIC ALCOHOL BEING 10-20% BY WEIGHT OF THE AMOUNT OF SAID UREA.
References Cited (Backward Citations)
GB320915A
Cited
DE535745C
Cited
US2389415A
Cited
US2317181A
Cited
US2322887A
Cited
US2322888A
Cited
US2374812A
Cited
FR933891A
Cited
US2524111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |