US2614940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultraviolet light absorbing film
Assignee: GAF Chemicals Corp
•
Filing: 1948-12-31
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Granted: 1952-10-21
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Expires: 1968-12-31
Abstract
No abstract record available.
Inventors
- 👤 Harlan B Freyermuth
- 👤 William O Ney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:01
CPC Classifications
A; A61; A61Q; A61Q17/00; A61Q17/04; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/33; A61K8/35; B; B29; B29C; B29C67/00; C; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42; G; G03; G03C; G03C1/00; G03C1/76; G03C1/815; G03C1/8155
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
AN IMPROVED ULTRAVIOLET LIGHT ABSORBING FILM COMPRISING A FILM-FORMING PLASTIC SOLUBLE IN AN AQUEOUS MEDIUM HAVING A PH OF 5 TO 9.5 AND A SALT OF A SULFONIC ACID, WHICH SULFONIC ACID HAS THE FORMULA:
Claim 2
Dependent Claim
35 words
AN IMPROVED ULTRAVIOLET LIGHT ABSORBING FILM COMPRISING A FILM-FORMING PLASTIC SOLUBLE IN AN AQUEOUS MEDIUM HAVING A PH OF 5 TO 9.5 AND A SALT OF A SULFONIC ACID, WHICH SULFONIC ACID HAS THE FORMULA:
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) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |