US2553604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated roofing granules and asbestos-cement slabs and methods of making same
Assignee: 3M Co
•
Filing: 1950-04-03
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Granted: 1951-05-22
•
Expires: 1970-04-03
Abstract
No abstract record available.
Inventors
- 👤 Gordon R Pole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:39
CPC Classifications
E; E04; E04D; E04D7/00; E04D7/005; C; C04; C04B; C04B20/00; C04B20/10; C04B20/1055; C04B28/00; C04B28/24; C04B28/26; C04B2111/00; C04B2111/00474; C04B2111/00482; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/2438; Y10T428/24388; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
THE METHOD OF ARTIFICIALLY COLORING BASE MATERIAL WHICH COMPRISES FORMING A HOMOGENEOUS SLIP OF PIGMENT, A SOLUBLE ALKALI METAL SILICATE AND A FLUOBORATE COMPRISING A MEMBER OF THE GROUP CONSISTING OF SODIUM FLUOBORATE AND AMMONIUM FLUOBORATE, SAID FLUOBORATE BEING NONREACTIVE WITH THE SILICATE AT ROOM TEMPERATURES OF THE ORDER OF 70* F., APPLYING A THIN COATING OF SAID SLIP UPON THE SURFACE OF SAID BASE MATERIAL, AND THEN HEATING SAID COATED SURFACE TO TEMPERATURES OF THE ORDER OF 375-500* F. TO REACT THE SILICATE AND FLUOBORATE TO PRODUCE A SURFACE SUBSTANTIALLY DEVOID OF FREE ALKALI AND OF LOW SOLUBLE SALT CONTENT.
Claim 2
Independent Claim
101 words
THE METHOD OF ARTIFICIALLY COLORING BASE MATERIAL WHICH COMPRISES FORMING A HOMOGENEOUS SLIP OF PIGMENT, A SOLUBLE ALKALI METAL SILICATE AND A FLUOBORATE COMPRISING A MEMBER OF THE GROUP CONSISTING OF SODIUM FLUOBORATE AND AMMONIUM FLUOBORATE, SAID FLUOBORATE BEING NONREACTIVE WITH THE SILICATE AT ROOM TEMPERATURES OF THE ORDER OF 70* F., APPLYING A THIN COATING OF SAID SLIP UPON THE SURFACE OF SAID BASE MATERIAL, AND THEN HEATING SAID COATED SURFACE TO TEMPERATURES OF THE ORDER OF 375-500* F. TO REACT THE SILICATE AND FLUOBORATE TO PRODUCE A SURFACE SUBSTANTIALLY DEVOID OF FREE ALKALI AND OF LOW SOLUBLE SALT CONTENT.
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) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |