US3200180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method op casting articles from liquid elastomers
Assignee: —
•
Filing: 1962-02-15
•
Granted: 1965-08-10
•
Expires: 1982-02-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:29
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/30; B29C70/36; B29C39/00; B29C39/02; B29C39/021; B29C39/025; B29C39/026; B29C39/028; B29C39/04; B29C39/08; B29C39/22; B29C39/42; B29C70/88; B29C70/887; B29D; B29D29/00; B29D29/08; B29D29/10; B29D29/106; B29D30/00; B29D30/06; B29D30/0679; B29K; B29K2075/00; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/10; B29K2105/101; B29L; B29L2030/00; B29L2031/00; B29L2031/709; B29L2031/7094
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A METHOD FOR CASTING AN ARTICLE OF MANUFACTURE FROM A VISCOUS LIQUID ELASTOMERIC MATERIAL COMPRISING THE STEPS OF: POSITIONING A MOLD MANDREL PORTION CONCENTRICALLY WITHIN A MOLD SHELL PORTION THEREBY FORMING A CAVITY BETWEEN SAID MANDREL PORTION AND SAID SHELL PORTION AND DEFINING THE CONTOUR OF THE ARTICLE TO BE CAST; APPLYING A VACUUM TO THE CAVITY FORMED BETWEEN SAID MANDREL AND SHELL TO EXHAUST GASES FROM SAID CAVITY; SIMULTANEOUSLY SPINNING THE ASSEMBLED MOLD AROUUND AN AXIS OF ROTATION OF THE MOLD; INTRODUCING A POLYMERIZABLE LIQUID ELASTOMERIC MATERIAL INTO THE SPINNING MOLD WHILE MAINTAINING THE VACUUM; COMPLETELY FILLING THE CAVITY AND PREVENTING THE FORMATION OF ANY OCCLUDED VOIDS OR BUBBLES BY CONTINUING TO MAINTAIN THE SPINNING AND VACUUM UNTIL THE FILLING OF SADI MOLD IS COMPLETE; POLYMERIZING THE RESULTANT PRODUCT TO FORM A UNITARY STRUCTURE.
Claim 2
Independent Claim
135 words
A METHOD FOR CASTING AN ARTICLE OF MANUFACTURE FROM A VISCOUS LIQUID ELASTOMERIC MATERIAL COMPRISING THE STEPS OF: POSITIONING A MOLD MANDREL PORTION CONCENTRICALLY WITHIN A MOLD SHELL PORTION THEREBY FORMING A CAVITY BETWEEN SAID MANDREL PORTION AND SAID SHELL PORTION AND DEFINING THE CONTOUR OF THE ARTICLE TO BE CAST; APPLYING A VACUUM TO THE CAVITY FORMED BETWEEN SAID MANDREL AND SHELL TO EXHAUST GASES FROM SAID CAVITY; SIMULTANEOUSLY SPINNING THE ASSEMBLED MOLD AROUUND AN AXIS OF ROTATION OF THE MOLD; INTRODUCING A POLYMERIZABLE LIQUID ELASTOMERIC MATERIAL INTO THE SPINNING MOLD WHILE MAINTAINING THE VACUUM; COMPLETELY FILLING THE CAVITY AND PREVENTING THE FORMATION OF ANY OCCLUDED VOIDS OR BUBBLES BY CONTINUING TO MAINTAIN THE SPINNING AND VACUUM UNTIL THE FILLING OF SADI MOLD IS COMPLETE; POLYMERIZING THE RESULTANT PRODUCT TO FORM A UNITARY STRUCTURE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |