Patent US2839144A successfully refreshed from Google Patents.
Patent US2784115A successfully refreshed from Google Patents.
US2784115A
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Method of producing titanium dioxide coatings
Assignee: Eastman Kodak Co
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Filing: 1953-05-04
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Granted: 1957-03-05
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Expires: 1973-05-04
Abstract
No abstract record available.
Inventors
- 👤 Doris S Brinsmaid
- 👤 William J Keenan
- 👤 George J Koch
- 👤 William F Parsons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:01
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C17/245; C03C17/2456; C03C17/34; C03C17/3411; C03C17/3429; C03C17/3447; C03C17/3452; C23C14/0021; G; G02; G02B; G02B5/00; G02B5/08; G02B5/0816; G02B5/0825; G02B5/0833; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/212; C03C2218/00; C03C2218/10; C03C2218/15; C03C2218/151; C03C2218/152
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
THE METHOD OF PRODUCING A DURABLE NON-LIGHT-ABSORBING COATING OF TITANIUM DIOXIDE ON THE SURFACE OF AN OPTICAL ELEMENT WHICH COMPRISES EVAPORATING METALLIC TITANIUM IN A NEAR VACUUM OF SUBSTANTIALLY PURE OXYGEN WITH THE OPTICAL ELEMENT SUPPORTED AT A DISTANCE FROM THE METALLIC TITANIUM, WHILE CONTINUOUSLY INTRODUCING OXYGEN INTO THE NEAR VACUUM DURING SAID EVAPORATING, THE RATE OF INTRODUCTION BALANCING THE LOSS DUE TO COMBINING WITH TITANIUM AND DUE TO ANY CONTINUING EVACUATION BY PUMPING, TO MAINTAIN A PRESSURE BETWEEN 2X10-4 AND 3X10-3MM. HG IN SAID NEAR VACUUM.
References Cited (Backward Citations)
US2281474A
Cited
US2539149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-04 | 1960-09-03 | 1961-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-04 | 1964-09-03 | 1965-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-04 | 1968-09-03 | 1969-03-05 | $7700.00 | Window Closed / Lapsed |