US4171986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binders based on alkali metal silicates and potassium metaborate
Assignee: Henkel AG and Co KGaA
•
Filing: 1978-03-24
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Granted: 1979-10-23
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Expires: 1998-03-24
Abstract
Abstract Binders based on aqueous alkali metal silicate solution containing from 20% to 55% by weight of alkali metal silicates having a molar ratio SiO 2 :M 2 O of 1.8 to 4, and a content of potassium metaborate.
Inventors
- 👤 Helmut v. Freyhold
- 👤 Wolfgang Persh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:10
CPC Classifications
C; C09; C09J; C09J1/00; C09J1/02; C04; C04B; C04B28/00; C04B28/24; C04B28/26
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
67 words
An adhesive binder based on an aqueous alkali metal silicate solution consisting essentially of water containing (a) from 20% to 55% by weight of an alkali metal silicate having a molar ratio of SiO 2 :M 2 O of from 1.8:1 to 4.0:1, where M represents an alkali metal, and (b) potassium metaborate, where the molar ratio of SiO 2 :potassium metaborate is from 5:1 to 20:1.
Claim 2
Dependent Claim
67 words
An adhesive binder based on an aqueous alkali metal silicate solution consisting essentially of water containing (a) from 20% to 55% by weight of an alkali metal silicate having a molar ratio of SiO 2 :M 2 O of from 1.8:1 to 4.0:1, where M represents an alkali metal, and (b) potassium metaborate, where the molar ratio of SiO 2 :potassium metaborate is from 5:1 to 20:1.
Claim 3
Dependent Claim
21 words
The adhesive binder of claim 1 wherein the molar ratio of SiO 2 :M 2 O is from 2.0:1 to 3.6:1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-22 | 1983-04-23 | 1983-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-22 | 1987-04-23 | 1987-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-22 | 1991-04-23 | 1991-10-23 | $7700.00 | Window Closed / Lapsed |