US2827384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waterproof coatings and adhesives
Assignee: PQ Corp
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Filing: 1955-06-21
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Granted: 1958-03-18
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Expires: 1975-06-21
Abstract
No abstract record available.
Inventors
- 👤 Freyhold Helmut Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:08
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/38; D21H19/40; D06; D06M; D06M11/00; D06M11/77; D06M11/79
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A SILICATE COATING AND ADHESIVE COMPOSITION COMPRISING AN AQUEOUS SODIUM SILICATE SOLUTION HAVING A RATIO OF NA2O TO SIO2 RANGING FROM ABOUT 1:2 TO 1:3:4 AND A GRAVITY RANGING FROM ABOUT 30* TO 60* BAUME AND CONTAINING FROPM ABOUT 0.5 TO 2% BY WEIGHT OF A COMPLEX WATER-SOLUBLE ALUMINUM SALT OF A LOW-MOLECULAR HYDROXYCARBOXYLIC ALIPHATIC ACID, WHEREBY THE BOND PRODUCED BY THE COMPOSITION IS RESISTANT TO WATER.
Claim 2
Dependent Claim
67 words
A SILICATE COATING AND ADHESIVE COMPOSITION COMPRISING AN AQUEOUS SODIUM SILICATE SOLUTION HAVING A RATIO OF NA2O TO SIO2 RANGING FROM ABOUT 1:2 TO 1:3:4 AND A GRAVITY RANGING FROM ABOUT 30* TO 60* BAUME AND CONTAINING FROPM ABOUT 0.5 TO 2% BY WEIGHT OF A COMPLEX WATER-SOLUBLE ALUMINUM SALT OF A LOW-MOLECULAR HYDROXYCARBOXYLIC ALIPHATIC ACID, WHEREBY THE BOND PRODUCED BY THE COMPOSITION IS RESISTANT TO WATER.
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) | 1961-03-17 | 1961-09-16 | 1962-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-17 | 1965-09-16 | 1966-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-17 | 1969-09-16 | 1970-03-18 | $7700.00 | Window Closed / Lapsed |