US2912351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens coating apparatus and process
Assignee: GTE Sylvania Inc
•
Filing: 1956-09-21
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Granted: 1959-11-10
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Expires: 1976-09-21
Abstract
No abstract record available.
Inventors
- 👤 Jack D Danner
- 👤 Rogers Glenville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:10
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/50; C23C14/505
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
41 words
IN A PROCESS FOR COATING THE SURFACES OF OPTICAL ARTICLES BY DEPOSIT THEREON OF A FILM OF TRANSPARENT MATERIAL OF A PREDETERMINED THICKNESS, THE STEPS OF MOVING THE ARTICLES SUBSTANTIALLY CONTINUOSLY AROUND AN EVAPORATION SOURCE OF SAID MATERIAL AND AUTOMATICALLY, PERIODICALLY
References Cited (Backward Citations)
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Cited
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Cited
FR1065922A
Cited
US2769728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |