Patent US4137194A successfully refreshed from Google Patents.
US4137194A
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Capsular products
Assignee: Polaroid Corp
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Filing: 1969-06-25
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Granted: 1979-01-30
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Expires: 1989-06-25
Abstract
Abstract Microscopic capsules comprising a nucleus surrounded by a film-forming polymeric layer having a substantially continuous light-reflecting metallic coating thereover.
Inventors
- 👤 William J. McCune, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:04
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/002; B; B01; B01J; B01J13/00; B01J13/02; B01J13/20; B01J13/22; G03C8/00; G03C8/42; G03C8/426; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
28 words
Microscopic capsules consisting essentially of a substantially continuous film-forming polymeric layer surrounding a nucleus comprising a color-providing substance, said polymeric layer having a substantially continuous metallic layer thereover.
Claim 2
Dependent Claim
28 words
Microscopic capsules consisting essentially of a substantially continuous film-forming polymeric layer surrounding a nucleus comprising a color-providing substance, said polymeric layer having a substantially continuous metallic layer thereover.
Claim 3
Dependent Claim
14 words
Microscopic capsules as defined in claim 1 wherein the color-providing substance is a dye.
Claim 4
Dependent Claim
14 words
Microscopic capsules as defined in claim 2 wherein said dye is a dye developer.
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) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |