Patent US3389682A successfully refreshed from Google Patents.
US3389682A
Expired / Lapsed
US
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High speed vacuum chuck
Assignee: AT&T Inc
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Filing: 1966-03-14
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Granted: 1968-06-25
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Expires: 1986-03-14
Abstract
No abstract record available.
Inventors
- 👤 Lawrence D Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:53
CPC Classifications
H; H10; H10P; H10P72/00; H10P72/04; H10P72/0448; B; B25; B25B; B25B11/00; B25B11/005; Y; Y10; Y10T; Y10T279/00; Y10T279/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A DEVICE FOR DISTRIBUTING A THIN LIQUID FILM OVER A TOP SURFACE OF A MEMBER COMPRISING: A COVER PLATE HAVING A CAVITY IN A TOP SURFACE THEREOF FOR RECEIVING THE MEMBER; THE CAVITY HAVING A DEPTH THAT IS SMALLER THAN THE THICKNESS OF THE MEMBER, WHEREBY THE INSERTED MEMBER PROTRUDES UPWARDLY FROM THE COVER PLATE; AN APERTURE WITHIN THE CAVITY THAT EXTENDS THROUGH THE COVER PLATE; A CENTRIFUGAL IMPELLER MOUNTED BELOW THE COVER PLATE; MEANS ASSOCIATED WITH THE IMPELLER ADAPTED TO SECURE THE COVER PLATE TO TE IMPELLER; AND
Claim 2
Independent Claim
89 words
A DEVICE FOR DISTRIBUTING A THIN LIQUID FILM OVER A TOP SURFACE OF A MEMBER COMPRISING: A COVER PLATE HAVING A CAVITY IN A TOP SURFACE THEREOF FOR RECEIVING THE MEMBER; THE CAVITY HAVING A DEPTH THAT IS SMALLER THAN THE THICKNESS OF THE MEMBER, WHEREBY THE INSERTED MEMBER PROTRUDES UPWARDLY FROM THE COVER PLATE; AN APERTURE WITHIN THE CAVITY THAT EXTENDS THROUGH THE COVER PLATE; A CENTRIFUGAL IMPELLER MOUNTED BELOW THE COVER PLATE; MEANS ASSOCIATED WITH THE IMPELLER ADAPTED TO SECURE THE COVER PLATE TO TE IMPELLER; AND
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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) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |