US3790442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binders for glass fiber insulation
Assignee: Fibreglass Ltd
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Filing: 1971-12-15
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Granted: 1974-02-05
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Expires: 1991-12-15
Abstract
Abstract A BINDER COMPOSITION FOR BONDING TOGETHER GLASS FIBERS COMPRISES A RESIN OF A PHENOL FORMALDEHYDE POLYMER AND TWO SETTING MODIFYING ADDITIVES, NAMELY UREA AND EITHER CALCIUM, MAGNESIUM OR AMMONIUM LIGNOSULFONATE SO THAT BY CONTROLLING THE AMOUNT OF UREA RELATIVE TO THE LIGNOSULFONATE ADDED TO FORM THE BINDER A DESIRED SETTING TIME CAN BE ACHIEVED.
Inventors
- 👤 R Ashall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:33
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/10; C08G12/12; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; C03C25/32; C03C25/34; C08G8/00; C08G8/04; C08G8/08; C08G8/10; C08G8/28; C08L; C08L61/00; C08L61/34; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T428/2907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |