Patent US3330252A successfully refreshed from Google Patents.
US3330252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Masking device
Assignee: Unisys Corp
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Filing: 1964-09-10
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Granted: 1967-07-11
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Expires: 1984-09-10
Abstract
No abstract record available.
Inventors
- 👤 Paul E Oberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:18
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/04; C23C14/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN APPARATUS FOR DEPOSITING A METALLIC COATING ON A SUBSTRATE IN A PREDETERMINED PATTERN, THE COMBINATION COMPRISING: A VACUUM CHAMBER; SOURCE OF METALLIC VAPOR CONTAINED IN SAID CHAMBER; AN ELECTRICALLY CONDUCTIVE SUBSTRATE POSITIONED TO RECEIVE SAID METALLIC VAPORS; AN ELECTRICALLY CONDUCTIVE THIN, FLEXIBLE MASK LACKING RIGIDITY IN A DIRECTION NORMAL TO THE PLANE OF SAID MASK DISPOSED BETWEEN SAID SUBSTRATE AND SAID SOURCE; AN ELECTRICALLY INSULATING MATERIAL POSITIONED BETWEEN SAID MASK AND SAID SUBSTRATE; AND MEANS FOR ESTABLISHING AN ELECTROSTATIC ATTRACTIVE FORCE BETWEEN SAID MASK AND SAID SUBSTRATE TO HOLD SAID MASK IN INTIMATE CONTACT WITH SAID SUBSTRATE.
Claim 2
Dependent Claim
98 words
IN APPARATUS FOR DEPOSITING A METALLIC COATING ON A SUBSTRATE IN A PREDETERMINED PATTERN, THE COMBINATION COMPRISING: A VACUUM CHAMBER; SOURCE OF METALLIC VAPOR CONTAINED IN SAID CHAMBER; AN ELECTRICALLY CONDUCTIVE SUBSTRATE POSITIONED TO RECEIVE SAID METALLIC VAPORS; AN ELECTRICALLY CONDUCTIVE THIN, FLEXIBLE MASK LACKING RIGIDITY IN A DIRECTION NORMAL TO THE PLANE OF SAID MASK DISPOSED BETWEEN SAID SUBSTRATE AND SAID SOURCE; AN ELECTRICALLY INSULATING MATERIAL POSITIONED BETWEEN SAID MASK AND SAID SUBSTRATE; AND MEANS FOR ESTABLISHING AN ELECTROSTATIC ATTRACTIVE FORCE BETWEEN SAID MASK AND SAID SUBSTRATE TO HOLD SAID MASK IN INTIMATE CONTACT WITH SAID SUBSTRATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |