Patent US2680734A successfully refreshed from Google Patents.
US2680734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper treating resin
Assignee: Honeywell International Inc
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Filing: 1950-01-26
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Granted: 1954-06-08
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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
2026-11-01 15:21
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.
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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) | 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 |