Patent US3249972A successfully refreshed from Google Patents.
US3249972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic shell molds and methods of production
Assignee: Precision Metalsmiths Inc
•
Filing: 1964-01-31
•
Granted: 1966-05-10
•
Expires: 1984-01-31
Abstract
No abstract record available.
Inventors
- 👤 Claude H Watts
- 👤 Robert A Horton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:33
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/02; B22C9/04; B22C7/00; B22C7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
IN A MOLDING OPERATION INCLUDING THE STEPS OF PROVIDING A SET-UP HAVING A SPRUE AND A PLURALITY OF LATERALLY EXTENDING PATTENS ATTACHED TO THE SPURE, COATING THE SETUP WITH A REFRACTORY SLURRY CONSISTING ESSENTIALLY OF A RERACTORY POWDER SUSPENDED IN A BINDER SOLUTION, STUCCOING THE COATING WITH REFRACTORY PARTICLES, AND DRYING THE COATING TO FORM A REFRACTORY LAYER, AN IMPROVED PROCESS OF APPLYING THE REFRACTORY SLURRY COMPRISING PROVIDING A REFRACTORY SLURRY BATH, SUPPORTING THE SET-UP FOR ROTATION ON ITS HORIZONTAL AXIS AND SO THAT ONLY PATTERNS ALONG THE LOWER SIDE OF THE SET-UP ARE IMMERSED IN THE SLURRY BATH, AND ROTATING THE SET-UP SO THAT ALL OF THE PATTERNS ARE CONTINUOUSLY MOVED INTO AND OUT OF THE BATH AND SO THAT THE ATTITUDE OF THE PATTERNS IS CONSTANTLY CHANGED, WHEREBY THE SLURRY IS CAUSED TO FLOW OVER AND UNIFORMLY COAT THE SET-UP.
Claim 2
Dependent Claim
142 words
IN A MOLDING OPERATION INCLUDING THE STEPS OF PROVIDING A SET-UP HAVING A SPRUE AND A PLURALITY OF LATERALLY EXTENDING PATTENS ATTACHED TO THE SPURE, COATING THE SETUP WITH A REFRACTORY SLURRY CONSISTING ESSENTIALLY OF A RERACTORY POWDER SUSPENDED IN A BINDER SOLUTION, STUCCOING THE COATING WITH REFRACTORY PARTICLES, AND DRYING THE COATING TO FORM A REFRACTORY LAYER, AN IMPROVED PROCESS OF APPLYING THE REFRACTORY SLURRY COMPRISING PROVIDING A REFRACTORY SLURRY BATH, SUPPORTING THE SET-UP FOR ROTATION ON ITS HORIZONTAL AXIS AND SO THAT ONLY PATTERNS ALONG THE LOWER SIDE OF THE SET-UP ARE IMMERSED IN THE SLURRY BATH, AND ROTATING THE SET-UP SO THAT ALL OF THE PATTERNS ARE CONTINUOUSLY MOVED INTO AND OUT OF THE BATH AND SO THAT THE ATTITUDE OF THE PATTERNS IS CONSTANTLY CHANGED, WHEREBY THE SLURRY IS CAUSED TO FLOW OVER AND UNIFORMLY COAT THE SET-UP.
References Cited (Backward Citations)
US2150510A
Cited
US3041689A
Cited
US3094751A
Cited
US3015138A
Cited
US3177537A
Cited
US3171174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |