Patent US3000833A successfully refreshed from Google Patents.
US3000833A
Expired / Lapsed
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Color salts of fluoren-9-ols as infrared absorbers
Assignee: Wyeth Holdings LLC
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Filing: 1959-01-26
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Granted: 1961-09-19
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Expires: 1979-01-26
Abstract
No abstract record available.
Inventors
- 👤 Ralph A Coleman
- 👤 Peter V Susi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:19
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/22; G02B5/223; C; C03; C03C; C03C17/00; C03C17/28; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18; C09; C09B; C09B11/00; C09B11/04; C09B11/10; C09B11/22; C09K; C09K5/00; C09K5/08; C09K5/14; C07; C07C; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/06; C07C2603/10; C07C2603/12; C07C2603/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
45 words
A METHOD OF PROTECTING MATERIALS FROM INCIDENT INFRARED RAYS WHICH COMPRISES INTERPOSING BETWEEN THE SOURCE OF SAID INFRARED RAYS AND THE MATERIAL TO BE PROTECTED, A BARRIER COMTAINING AT LEAST 0.005 GRAM PER SQUARE FOOT OF BARRIER OF SALT OF A 9-PHENYLFLUOREN-9-OL OF THE STRUCTURE:
References Cited (Backward Citations)
US1091443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |