Patent US3324294A successfully refreshed from Google Patents.
US3324294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collimator for eliminating internal reflections comprising a plurality of aligned aperture arrays
Assignee: Comstock and Wescott Inc
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Filing: 1964-08-13
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Granted: 1967-06-06
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Expires: 1984-08-13
Abstract
No abstract record available.
Inventors
- 👤 Jr John F Mcgrath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:09
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/02; G21K1/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A COLLIMATOR OF LENGTH L COMPRISING: A PLURALITY OF A ALIGNED APERTURE ARRAYS, EACH ARRAY CONTAINING 2(A-2) APERTURES, THE WIDTH OF EACH APERTURE BEING LESS THAN HALF THE DISTANCE BETWEEN ADJACENT APERTURE CENTERS, THE SPACINGS S BETWEEN ARRAYS BEING SUCH AS TO INCLUDE ALL VALUES OF
Claim 2
Dependent Claim
46 words
A COLLIMATOR OF LENGTH L COMPRISING: A PLURALITY OF A ALIGNED APERTURE ARRAYS, EACH ARRAY CONTAINING 2(A-2) APERTURES, THE WIDTH OF EACH APERTURE BEING LESS THAN HALF THE DISTANCE BETWEEN ADJACENT APERTURE CENTERS, THE SPACINGS S BETWEEN ARRAYS BEING SUCH AS TO INCLUDE ALL VALUES OF
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) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |