US3214283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photochromic cement
Assignee: Wyeth Holdings LLC
•
Filing: 1962-12-31
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Granted: 1965-10-26
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Expires: 1982-12-31
Abstract
No abstract record available.
Inventors
- 👤 John A Chopoorian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:30
CPC Classifications
C; C04; C04B; C04B14/00; C04B14/02; C04B14/36; C01; C01G; C01G39/00; C04B14/30; C04B2111/00; C04B2111/80; Y; Y10; Y10S; Y10S204/00; Y10S204/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
220 words
HYDRAULIC CEMENT IN ADMIXTURE WITH FROM 10% TO ABOUT 50% BY WEIGHT, BASED ON THE WEIGHT OF THE CEMENT, OF AN INORGANIC PHOTOCHROMIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF (A) TIO2 DOPED WITH AN OXIDE SELECTED FROM THE GROUP CONSISTING OF FE2O3, FEO, CR2O3, CUO, NIO, MNO2, MN2O3, A MIXTURE OF FE2O3 AND NIO, A MIXTURE OF FE2O3 AND CUO, A MIXTURE OF FEO AND NIO AND A MIXTURE OF FEO AND CUO, (B) NB2O5 DOPED WITH AN OXIDE SELECTED FROM THE GROUP CONSISTING OF FE2O3, FEO, CR2O3, CUO, V2O5, MNO2, AND MN2O5, (C) AL2O3 DOPED WITH AN OXIDE SELECTED FROM THE ROUP CONSISTING OF CR2O3 AND V2O5, (D) ZNO2 DOPED WITH AN OXIDE SELECTED FROM THE GROUP CONSISTING OF CUO AND V2O5, (E) SNO2 DOPED WITH CUO, (F) ZRO2 DOPED WITH AN OXIDE SELECTED FROM THE GROUP CONSISTING OF CUO AND NIO, (G) TIO2 REACTED WITH AN OXIDE SELECTED FROM THE GROUP CONSISTING OF MOO3 AND WO3, (H) ZNO REACTED WITH AN OXIDE SELECTED FROM THE GROUP CONSISTING OF MOO3 AND WO3, (I) ZRO3 REACTED WITH AN OXIDE SELECTED FROM THE GROUP CONSISTING OF MOO3 AND WO3, (J) SNO2 REACTED WITH AN OXIDE SELECTED FROM THE GROUP CONSISTING OF MOO3 AND WO3 AND (K) GEO2 REACTED WITH AN OXIDE SELECTED FROM THE GROUP CONSISTING OF MOO3 AND WO3.
Claim 2
Dependent Claim
220 words
HYDRAULIC CEMENT IN ADMIXTURE WITH FROM 10% TO ABOUT 50% BY WEIGHT, BASED ON THE WEIGHT OF THE CEMENT, OF AN INORGANIC PHOTOCHROMIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF (A) TIO2 DOPED WITH AN OXIDE SELECTED FROM THE GROUP CONSISTING OF FE2O3, FEO, CR2O3, CUO, NIO, MNO2, MN2O3, A MIXTURE OF FE2O3 AND NIO, A MIXTURE OF FE2O3 AND CUO, A MIXTURE OF FEO AND NIO AND A MIXTURE OF FEO AND CUO, (B) NB2O5 DOPED WITH AN OXIDE SELECTED FROM THE GROUP CONSISTING OF FE2O3, FEO, CR2O3, CUO, V2O5, MNO2, AND MN2O5, (C) AL2O3 DOPED WITH AN OXIDE SELECTED FROM THE ROUP CONSISTING OF CR2O3 AND V2O5, (D) ZNO2 DOPED WITH AN OXIDE SELECTED FROM THE GROUP CONSISTING OF CUO AND V2O5, (E) SNO2 DOPED WITH CUO, (F) ZRO2 DOPED WITH AN OXIDE SELECTED FROM THE GROUP CONSISTING OF CUO AND NIO, (G) TIO2 REACTED WITH AN OXIDE SELECTED FROM THE GROUP CONSISTING OF MOO3 AND WO3, (H) ZNO REACTED WITH AN OXIDE SELECTED FROM THE GROUP CONSISTING OF MOO3 AND WO3, (I) ZRO3 REACTED WITH AN OXIDE SELECTED FROM THE GROUP CONSISTING OF MOO3 AND WO3, (J) SNO2 REACTED WITH AN OXIDE SELECTED FROM THE GROUP CONSISTING OF MOO3 AND WO3 AND (K) GEO2 REACTED WITH AN OXIDE SELECTED FROM THE GROUP CONSISTING OF MOO3 AND WO3.
References Cited (Backward Citations)
US2092838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |