US2813802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infra-red filter media
Assignee: Monsanto Chemicals Ltd
•
Filing: 1955-02-24
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Granted: 1957-11-19
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Expires: 1975-02-24
Abstract
No abstract record available.
Inventors
- 👤 George W Ingle
- 👤 William B Tuemmler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:24
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/22; G02B5/223
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
A SOLID PELLUCID MATERIAL HAVING PHYSICALLY ASSOCIATED THEREWITH A BIS(P-AMINOPHENYL) VINYL CARBONIUM COMPOUND OF THE CLASS
Claim 2
Dependent Claim
16 words
A SOLID PELLUCID MATERIAL HAVING PHYSICALLY ASSOCIATED THEREWITH A BIS(P-AMINOPHENYL) VINYL CARBONIUM COMPOUND OF THE CLASS
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) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |