US3221365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming optical elements
Assignee: Bausch and Lomb Inc
•
Filing: 1962-12-14
•
Granted: 1965-12-07
•
Expires: 1982-12-14
Abstract
No abstract record available.
Inventors
- 👤 John S Mattern
- 👤 Renald R Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:14
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/02; B30B15/022; B28; B28B; B28B3/00; B28B3/02; B28B3/025; B30B15/34; H; H10; H10N; H10N30/00; H10N30/01; H10N30/08; H10N30/084; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
APPARATUS FOR HOT PRESSING CERAMIC MATERIAL COMPRISING A SUSCEPTOR, A PRESSED CERAMIC RING CONFINED BY SAID SUSPECTOR AND A TUBE CONSISTING ESSENTIALLY OF PLATINUM DISPOSED CONCENTRIC WITH SAID RING AND SEPARATED FROM SAID SUSCEPTOR BY SAID RING, A POWDER ENVELOPE CONFINED BY SAID TUBE AND A PAIR OF CERAMIC PLUNGERS IN SLIDING CONTACT WITH SAID TUBE AND ADAPTED TO TRANSMIT PRES-
Claim 2
Dependent Claim
61 words
APPARATUS FOR HOT PRESSING CERAMIC MATERIAL COMPRISING A SUSCEPTOR, A PRESSED CERAMIC RING CONFINED BY SAID SUSPECTOR AND A TUBE CONSISTING ESSENTIALLY OF PLATINUM DISPOSED CONCENTRIC WITH SAID RING AND SEPARATED FROM SAID SUSCEPTOR BY SAID RING, A POWDER ENVELOPE CONFINED BY SAID TUBE AND A PAIR OF CERAMIC PLUNGERS IN SLIDING CONTACT WITH SAID TUBE AND ADAPTED TO TRANSMIT PRES-
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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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |