US3099498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for manufacturing resin coated core sand
Assignee: SHELL PROCESS Inc
•
Filing: 1960-05-06
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Granted: 1963-07-30
•
Expires: 1980-05-06
Abstract
No abstract record available.
Inventors
- 👤 Earl W Jahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:36
CPC Classifications
B; B22; B22C; B22C5/00; B22C5/04; B22C23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
IN THE MANUFACTURE OF RESIN COATED SAND, APPARATUS FOR TREATING SAND COMPRISING A CHAMBER, A GAS PERMEABLE DIAPHRAGM FORMING THE BOTTOM OF SAID CHAMBER, MEANS FORCING AIR UPWARDLY INTO SAID CHAMBER THROUGH SAID DIAPHRAGM WITH SUFFICIENT ENERGY TO MAINTAIN THE GRAINS OF SAND IN A STATE OF AGITATION, SAID DIAPHGRAM COMPRISING SPACED OPPOSED SCREENS, THE SPACE BETWEEN SAID SCREENS BEING FILLED WITH A HEAT-RESISTANT FLUENT, GRANULAR MATERIAL,
Claim 2
Dependent Claim
67 words
IN THE MANUFACTURE OF RESIN COATED SAND, APPARATUS FOR TREATING SAND COMPRISING A CHAMBER, A GAS PERMEABLE DIAPHRAGM FORMING THE BOTTOM OF SAID CHAMBER, MEANS FORCING AIR UPWARDLY INTO SAID CHAMBER THROUGH SAID DIAPHRAGM WITH SUFFICIENT ENERGY TO MAINTAIN THE GRAINS OF SAND IN A STATE OF AGITATION, SAID DIAPHGRAM COMPRISING SPACED OPPOSED SCREENS, THE SPACE BETWEEN SAID SCREENS BEING FILLED WITH A HEAT-RESISTANT FLUENT, GRANULAR MATERIAL,
References Cited (Backward Citations)
US2059983A
Cited
US2448745A
Cited
US2586818A
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US2666269A
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US2785478A
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US2807556A
Cited
US2924489A
Cited
US2816803A
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US2965514A
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US2919159A
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US2844489A
Cited
US2915338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-29 | 1967-01-28 | 1967-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-29 | 1971-01-28 | 1971-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-29 | 1975-01-28 | 1975-07-30 | $7700.00 | Window Closed / Lapsed |