Patent US3314795A successfully refreshed from Google Patents.
US3314795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photochromic cellulosic paper, synthetic paper and regenerated cellulose
Assignee: Wyeth Holdings LLC
•
Filing: 1963-03-01
•
Granted: 1967-04-18
•
Expires: 1983-03-01
Abstract
No abstract record available.
Inventors
- 👤 Dorion George Henry
- 👤 Loeffler Kay Oesterle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:08
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03C1/705; Y; Y10; Y10S; Y10S348/00; Y10S348/902; Y10S430/00; Y10S430/148; Y10S430/163
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A WATER-LAID WEB COMPRISING WATER-FIBRILLATED, RANDOMLY INTERMINGLED, INTERLOCKED, FILAMENTS OF PAPER-MAKING LENGTH OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A FIBROUS, CELLULOSIC MATERIAL AND A FIBROUS, THERMOPLASTIC, ACRYLONITRILE-CONTAINING, POLYMERIC MATERIAL, SAID WEB HAVING UNIFORMLY DISTRIBUTED THROUGHOUT THE INTERSTICES THEREOF, AT LEAST 0.1%, BY WEIGHT, BASED ON THE WEIGHT OF THE WEB, OF A PHOTOCHROMIC MATERIAL WHICH IS A SOLID AT ROOM TEMPERATURE AND WHICH FUNCTIONS PHOTOCHROMICALLY AS A SOLID.
Claim 2
Dependent Claim
71 words
A WATER-LAID WEB COMPRISING WATER-FIBRILLATED, RANDOMLY INTERMINGLED, INTERLOCKED, FILAMENTS OF PAPER-MAKING LENGTH OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A FIBROUS, CELLULOSIC MATERIAL AND A FIBROUS, THERMOPLASTIC, ACRYLONITRILE-CONTAINING, POLYMERIC MATERIAL, SAID WEB HAVING UNIFORMLY DISTRIBUTED THROUGHOUT THE INTERSTICES THEREOF, AT LEAST 0.1%, BY WEIGHT, BASED ON THE WEIGHT OF THE WEB, OF A PHOTOCHROMIC MATERIAL WHICH IS A SOLID AT ROOM TEMPERATURE AND WHICH FUNCTIONS PHOTOCHROMICALLY AS A SOLID.
References Cited (Backward Citations)
US2735783A
Cited
CA582773A
Cited
US2336299A
Cited
US2710274A
Cited
US3052539A
Cited
US2921407A
Cited
US3090687A
Cited
US3127335A
Cited
US3214382A
Cited
US3212898A
Cited
US3160504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-17 | 1970-10-17 | 1971-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-17 | 1974-10-17 | 1975-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-17 | 1978-10-17 | 1979-04-18 | $7700.00 | Window Closed / Lapsed |