US3304180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grafted paper and grafted cellophane compositions containing photochromic materials
Assignee: Wyeth Holdings LLC
•
Filing: 1963-03-01
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Granted: 1967-02-14
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Expires: 1983-03-01
Abstract
No abstract record available.
Inventors
- 👤 Dorion George Henry
- 👤 Loeffler Kay Oesterle
- 👤 Rakowitz David Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:33
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/685; G03C1/72; G03C1/73; Y; Y10; Y10S; Y10S430/00; Y10S430/163
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A BASE MATERIAL SELECTED FROM THE GROUP CONSISTING OF GRAFTED, FIBROUS, CELLULOSIC PAPER, AND GRAFTED, NON-FIBROUS, REGENERATED CELLULOSE FILM HAVING INTIMATELY AND UNIFORMLY DISPERSED THROUGHOUT THE BODY THEREOF AT LEAST ABOUT 0.1%, BY WEIGHT, BASED ON THE WEIGHT OF THE BASE, OF A PHOTOCHROMIC MATERIAL WHICH FUNCTIONS PHOTOCHROMICALLY IN SOLUTION.
Claim 2
Dependent Claim
50 words
A BASE MATERIAL SELECTED FROM THE GROUP CONSISTING OF GRAFTED, FIBROUS, CELLULOSIC PAPER, AND GRAFTED, NON-FIBROUS, REGENERATED CELLULOSE FILM HAVING INTIMATELY AND UNIFORMLY DISPERSED THROUGHOUT THE BODY THEREOF AT LEAST ABOUT 0.1%, BY WEIGHT, BASED ON THE WEIGHT OF THE BASE, OF A PHOTOCHROMIC MATERIAL WHICH FUNCTIONS PHOTOCHROMICALLY IN SOLUTION.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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Cited
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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) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |