US2800690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preventing erosion of core boxes opposite the blow holes thereof
Assignee: Individual
•
Filing: 1955-12-20
•
Granted: 1957-07-30
•
Expires: 1975-12-20
Abstract
No abstract record available.
Inventors
- 👤 Richard L Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:10
CPC Classifications
B; B22; B22C; B22C7/00; B22C7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
IN A METHOD OF PREVENTING EROSION OF INTERNAL SURFACES OF SAND CORE BOXES OPPOSITE THE BLOW HOLES OR BLOW TUBES THEREOF, APPLYING TO THE AREAS SUBJECT TO EROSION A THIN FILM-LIKE EROSION RESISTANT LAYER IN THE FORM OF A FLEXIBLE PAD HAVING THEREON A PRESSURE SENSITIVE ADHESIVE FOR BONDING THE PAD TO THE RESPECTIVE AREA TO BE PROTECTED.
Claim 2
Dependent Claim
58 words
IN A METHOD OF PREVENTING EROSION OF INTERNAL SURFACES OF SAND CORE BOXES OPPOSITE THE BLOW HOLES OR BLOW TUBES THEREOF, APPLYING TO THE AREAS SUBJECT TO EROSION A THIN FILM-LIKE EROSION RESISTANT LAYER IN THE FORM OF A FLEXIBLE PAD HAVING THEREON A PRESSURE SENSITIVE ADHESIVE FOR BONDING THE PAD TO THE RESPECTIVE AREA TO BE PROTECTED.
References Cited (Backward Citations)
US1761522A
Cited
US2233097A
Cited
GB645563A
Cited
US2510417A
Cited
US2553627A
Cited
US2659119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |