Patent US2517090A successfully refreshed from Google Patents.
US2517090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of molding magnesite products
Assignee: F E Schundler & Co Inc
•
Filing: 1946-11-09
•
Granted: 1950-08-01
•
Expires: 1966-11-09
Abstract
No abstract record available.
Inventors
- 👤 Paul S Denning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:51
CPC Classifications
B; B28; B28B; B28B3/00; B28B3/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
THE METHOD OF MAKING MOLDED MAGNESITE PRODUCTS WHICH COMPRISES SUBSTANTIALLY SATURATING A POROUS BLANKET-LIKE SHEET WITH A SLURRY OF MAGNESIA CEMENT OF THE CLASS CONSISTING OF MAGNESIUM OXYCHLORIDE AND MAGNESIUM OXYSULPHATE CEMENT, REMOVING EXCESS SLURRY, APPLYING THE SHEET TO A MOLD SURFACE TO PROVIDE A CEMENTITIOUS LAYER, COVERING SAID LAYER WITH A FLEXIBLE IMPERVIOUS COVER, PLACING THE MOLD IN A PRESSURE CHAMBER, FILLING THE CHAMBER WITH HOT WATER, AND APPLYING PRESSURE TO THE HOT WATER TO HEAT AND COMPRESS THE SAID LAYER, THERE BEING SUFFICIENT SLURRY REMAINING IN THE POROUS SHEET THAT WHEN THE LATTER IS COMPRESSED AS AFORESAID THERE WILL BE A SUFFICIENT SURPLUS OF CEMENT TO PROVIDE AN OUTER LAYER OF CEMENT SUBSTANTIALLY FREE OF FIBER.
Claim 2
Independent Claim
118 words
THE METHOD OF MAKING MOLDED MAGNESITE PRODUCTS WHICH COMPRISES SUBSTANTIALLY SATURATING A POROUS BLANKET-LIKE SHEET WITH A SLURRY OF MAGNESIA CEMENT OF THE CLASS CONSISTING OF MAGNESIUM OXYCHLORIDE AND MAGNESIUM OXYSULPHATE CEMENT, REMOVING EXCESS SLURRY, APPLYING THE SHEET TO A MOLD SURFACE TO PROVIDE A CEMENTITIOUS LAYER, COVERING SAID LAYER WITH A FLEXIBLE IMPERVIOUS COVER, PLACING THE MOLD IN A PRESSURE CHAMBER, FILLING THE CHAMBER WITH HOT WATER, AND APPLYING PRESSURE TO THE HOT WATER TO HEAT AND COMPRESS THE SAID LAYER, THERE BEING SUFFICIENT SLURRY REMAINING IN THE POROUS SHEET THAT WHEN THE LATTER IS COMPRESSED AS AFORESAID THERE WILL BE A SUFFICIENT SURPLUS OF CEMENT TO PROVIDE AN OUTER LAYER OF CEMENT SUBSTANTIALLY FREE OF FIBER.
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) | 1953-07-31 | 1954-01-30 | 1954-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-31 | 1958-01-30 | 1958-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-31 | 1962-01-30 | 1962-08-01 | $7700.00 | Window Closed / Lapsed |