US3278448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra-violet protective light filter
Assignee: Bayer AG
•
Filing: 1960-05-17
•
Granted: 1966-10-11
•
Expires: 1980-05-17
Abstract
No abstract record available.
Inventors
- 👤 Lauerer Dorothea
- 👤 Pestemer Max
- 👤 Coenen Max
- 👤 Buchwald Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:51
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/22; G02B5/223; C; C09; C09K; C09K15/00; C09K15/04; G02B5/208
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A LIGHT FILTER FOR PROTECTING SUBSTANCES FROM ULTRAVIOLET RADIATION, INCLUSIVE OF LIGHT WITHIN THE RANGE OF 330M$-400M$, THE FILTER CONSISTING ESSENTIALLY OF A LIGHT PERVIOUS SUPPORT LAYER HAVING INCORPORATED THEREWITH A SUBSTANTIAL LIGHT ABSORBING AMOUNT OF A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
41 words
A LIGHT FILTER FOR PROTECTING SUBSTANCES FROM ULTRAVIOLET RADIATION, INCLUSIVE OF LIGHT WITHIN THE RANGE OF 330M$-400M$, THE FILTER CONSISTING ESSENTIALLY OF A LIGHT PERVIOUS SUPPORT LAYER HAVING INCORPORATED THEREWITH A SUBSTANTIAL LIGHT ABSORBING AMOUNT OF A COMPOUND HAVING 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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |