US2873260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urea-formaldehyde gap-filling adhesive
Assignee: Beazer East Inc
•
Filing: 1955-06-16
•
Granted: 1959-02-10
•
Expires: 1975-06-16
Abstract
No abstract record available.
Inventors
- 👤 John F Corwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:40
CPC Classifications
C; C09; C09J; C09J161/00; C09J161/20; C09J161/22; C09J161/24; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/26; C08L2666/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A CRAZE-RESISTANT, ACID-HARDENABLE, GAP-FILLING ADHESIVE COMPRISING A WATER-SOLUBLE UREA-FORMALDEHYDE CONDENSATE, A CELLULOSIC FILLER TO INCREASE THE CONSISTENCY THEREOF AND ABOUT 30% TO ABOUT 38% BY WEIGHT OF DRY CONDENSATE OF DIMETHLY FORMAMIDE, THE MOLAR PROPORTION OF UREA TO FORMALDEHYDE IN SAID CONDENSATE RANGING BETWEEN 1:1.75 TO 1:1.9.
Claim 2
Dependent Claim
47 words
A CRAZE-RESISTANT, ACID-HARDENABLE, GAP-FILLING ADHESIVE COMPRISING A WATER-SOLUBLE UREA-FORMALDEHYDE CONDENSATE, A CELLULOSIC FILLER TO INCREASE THE CONSISTENCY THEREOF AND ABOUT 30% TO ABOUT 38% BY WEIGHT OF DRY CONDENSATE OF DIMETHLY FORMAMIDE, THE MOLAR PROPORTION OF UREA TO FORMALDEHYDE IN SAID CONDENSATE RANGING BETWEEN 1:1.75 TO 1:1.9.
References Cited (Backward Citations)
US2535475A
Cited
US2689236A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |