Patent US3305422A successfully refreshed from Google Patents.
US3305422A
Expired / Lapsed
US
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Method and means for making ambient light filter
Assignee: Douglas Aircraft Co Inc
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Filing: 1963-06-17
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Granted: 1967-02-21
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Expires: 1983-06-17
Abstract
No abstract record available.
Inventors
- 👤 Vern E Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:09
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/89; H01J29/896; B; B29; B29C; B29C67/00; G; G02; G02B; G02B5/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1023; Y10T156/1052; Y10T156/1059; Y10T156/12; Y10T156/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A METHOD OF PRODUCING SPACE-LATTICE TYPE AMBIENT LIGHT TRAPPING FILTERS, COMPRISING: SUPPLYING A CONTINUOUS WEB OF TRANSPARENT PLASTIC MATERIAL; TRANSLATING SAID WEB LONGITUDINALLY; PRODUCING A SERIES OF UNIFORMLY SPACED DIMPLES ALONG AT LEAST ONE MARGIN OF SAID WEB; IMPRINTING ON ONE FACE OF SAID WEB A CONTINUOUS PREDETERMINED GRID PATTERN; APPLYING A COAT OF CEMENT TO THE OTHER FACE OF SAID WEB; DIVIDING THE WEB INTO SHEETS OF PREDETERMINED LENGTH; ARRANGING A PLURALITY OF SAID SHEETS IN LAMINAR RELATION WITH SAID DIMPLES IN REGISTRY TO PRODUCE A PREDETERMINED DEPTHWISE REGISTRY OF THE GRID PATTERNS; AND APPLYING DEPTHWISE DIRECTED PRESSURE TO THE LAMINATED SHEETS TO UNTIE THEM INTO COMPLETED AMBIENT LIGHT TRAPPING FILTERS.
Claim 2
Independent Claim
112 words
A METHOD OF PRODUCING SPACE-LATTICE TYPE AMBIENT LIGHT TRAPPING FILTERS, COMPRISING: SUPPLYING A CONTINUOUS WEB OF TRANSPARENT PLASTIC MATERIAL; TRANSLATING SAID WEB LONGITUDINALLY; PRODUCING A SERIES OF UNIFORMLY SPACED DIMPLES ALONG AT LEAST ONE MARGIN OF SAID WEB; IMPRINTING ON ONE FACE OF SAID WEB A CONTINUOUS PREDETERMINED GRID PATTERN; APPLYING A COAT OF CEMENT TO THE OTHER FACE OF SAID WEB; DIVIDING THE WEB INTO SHEETS OF PREDETERMINED LENGTH; ARRANGING A PLURALITY OF SAID SHEETS IN LAMINAR RELATION WITH SAID DIMPLES IN REGISTRY TO PRODUCE A PREDETERMINED DEPTHWISE REGISTRY OF THE GRID PATTERNS; AND APPLYING DEPTHWISE DIRECTED PRESSURE TO THE LAMINATED SHEETS TO UNTIE THEM INTO COMPLETED AMBIENT LIGHT TRAPPING FILTERS.
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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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |