US3271179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture of an optical filter
Assignee: Temescal Metallurgical Corp
•
Filing: 1962-09-24
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Granted: 1966-09-06
•
Expires: 1982-09-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Hugh R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:01
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/28; G02B5/289; C; C03; C03C; C03C17/00; C03C17/34; C03C17/3411; C03C17/3417; C03C17/3429; C03C17/3447
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A METHOD FOR THE MANUFACTURE OF AN OPTICAL FILTER WHICH INCLUDES A LIGHT FILTERING COATING ON THE SURFACE OF AN OPTICAL SUBSTRATE COMPRISING, VAPORIZING AT LEAST TWO MATERIALS HAVING DIFFERENT REFRACTIVE INDEXES BY ELECTRON BOMBARDMENT OF THE SURFACES THEREOF IN A HIGH VACUUM TO FORM A VAPOR MIXTURE OF SAID MATERIALS, CONDENSING SAID
Claim 2
Independent Claim
53 words
A METHOD FOR THE MANUFACTURE OF AN OPTICAL FILTER WHICH INCLUDES A LIGHT FILTERING COATING ON THE SURFACE OF AN OPTICAL SUBSTRATE COMPRISING, VAPORIZING AT LEAST TWO MATERIALS HAVING DIFFERENT REFRACTIVE INDEXES BY ELECTRON BOMBARDMENT OF THE SURFACES THEREOF IN A HIGH VACUUM TO FORM A VAPOR MIXTURE OF SAID MATERIALS, CONDENSING SAID
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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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |