Patent US3790441A successfully refreshed from Google Patents.
US3790441A
Expired / Lapsed
US
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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 COMPRISES A RESIN OF A PHENOL-FORMALDEHYDE POLYMER, AND UREA AND SODIUM LIGOSULFONATE AS BINDER SETTING MODIFYING ADDITIVES SUCH THAT BY VARYING THE RELATIVE PROPORTIONS OF UREA AND SODIUM LIGNOSULFONATE ADDED, A PREDETERMINED SETTING TIME CAN BE ACHIEVED.
Inventors
- 👤 R Ashall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:27
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; Y10T428/31504; Y10T428/31551; Y10T428/31627
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 |