US3127335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing ac
Assignee: —
•
Filing: —
•
Granted: 1964-03-31
•
Expires: 1981-03-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:10
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PROCESS FOR THE PREPARATION OF AN ACI-AROMATIC NITROMETHANE ADAPTED FOR USE AS A REVERSIBLE LIGHT-SENSITIVE PHOTOCHROMIC ADDITIVE TO SUBSTANTIALLY COLORLESS POLYMERIC MATERIALS WHICH COMPRISES: IRRADIATING AN AROMATIC NITROMETHANE IN THE PRESENCE OF ULTRAVIOLET LIGHT FROM ABOUT 2500 A. UNITS TO ABOUT 4000 A. UNITS AT TEMPERATURES WITHIN THE RANGE FROM ABOUT MINUS (-) 40*C. TO ABOUT MINUS (-) 100*C. FOR FROM ABOUT FIVE MINUTES TO NOT MORE THAN ONE HOUR, AND RECOVERING THE CORRESPONDING ACI-AROMATIC NITROMETHANE INDEFINITELY STABLE AT THE AFOREMENTIONED TEMPERATURE RANGE, BUT CONVERTIBLE TO ITS ORIGINAL FORM AT ROOM TEMPERATURE.
Claim 2
Dependent Claim
93 words
A PROCESS FOR THE PREPARATION OF AN ACI-AROMATIC NITROMETHANE ADAPTED FOR USE AS A REVERSIBLE LIGHT-SENSITIVE PHOTOCHROMIC ADDITIVE TO SUBSTANTIALLY COLORLESS POLYMERIC MATERIALS WHICH COMPRISES: IRRADIATING AN AROMATIC NITROMETHANE IN THE PRESENCE OF ULTRAVIOLET LIGHT FROM ABOUT 2500 A. UNITS TO ABOUT 4000 A. UNITS AT TEMPERATURES WITHIN THE RANGE FROM ABOUT MINUS (-) 40*C. TO ABOUT MINUS (-) 100*C. FOR FROM ABOUT FIVE MINUTES TO NOT MORE THAN ONE HOUR, AND RECOVERING THE CORRESPONDING ACI-AROMATIC NITROMETHANE INDEFINITELY STABLE AT THE AFOREMENTIONED TEMPERATURE RANGE, BUT CONVERTIBLE TO ITS ORIGINAL FORM AT ROOM TEMPERATURE.
References Cited (Backward Citations)
US2864753A
Cited
US3022318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-31 | 1967-09-30 | 1968-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-31 | 1971-09-30 | 1972-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-31 | 1975-09-30 | 1976-03-31 | $7700.00 | Window Closed / Lapsed |