Patent US3272646A successfully refreshed from Google Patents.
US3272646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnated porous photochromic glass
Assignee: Wyeth Holdings LLC
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Filing: 1963-04-16
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Granted: 1966-09-13
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Expires: 1983-04-16
Abstract
No abstract record available.
Inventors
- 👤 Chopoorian John Andrew
- 👤 Loeffler Kay Oesterle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:27
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; C; C03; C03C; C03C3/00; C03C3/04; C03C3/06; G02; G02B; G02B5/00; G02B5/20; G02B5/22; G02B5/23; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S430/00; Y10S430/163; Y10S501/00; Y10S501/90; Y10S501/905; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31645; Y10T428/31649
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
AN ARTICLE OF MANUFACTURE COMPRISING A POROUS GLASS SUBSTRATE HAVING A PORE DIAMETER RANGING FROM ABOUT 15 A. TO ABOUT 200 A., AND HAVING A SOLUTION OF AN AROMATIC DIAMINOTETRAACETIC ACID CONTAINED IN SAID PORES.
Claim 2
Dependent Claim
35 words
AN ARTICLE OF MANUFACTURE COMPRISING A POROUS GLASS SUBSTRATE HAVING A PORE DIAMETER RANGING FROM ABOUT 15 A. TO ABOUT 200 A., AND HAVING A SOLUTION OF AN AROMATIC DIAMINOTETRAACETIC ACID CONTAINED IN SAID PORES.
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |