US2734044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical cement
Assignee: —
•
Filing: —
•
Granted: 1956-02-07
•
Expires: 1973-02-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:26
CPC Classifications
G; G02; G02B; G02B1/00; C; C09; C09J; C09J4/00; C09J4/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
THE METHOD OF CEMENTING OPTICAL ELEMENTS WHICH COMPRISES: MIXING WITH ABOUT 1 PER CENT BY VOLUME OF TERTIARY BUTYL PERBENZOATE A LIQUID CEMENT CONSISTING OF BETWEEN 60 TO 80 PARTS BY WEIGHT OF A STYRENE FRACTION MADE UP OF ABOUT 12 PARTS BY WEIGHT OF POLYSTYRENE AND ABOUT 48 PARTS BY WEIGHT OF STYRENE, BETWEEN 40 TO 20 PARTS BY WEIGHT OF ALPHA-METHYL STYRENE, AND FROM 1 TO 5 PARTS BY WEIGHT OF DIVINYL BENZENE; APPLYING THIS MIXTURE TO THE OPTICAL ELEMENTS; AND BAKING THIS ASSEMBLY FOR BETWEEN 16 TO 40 HOURS AT A TEMPERATURE OF BETWEEN 110* TO 150* C.
Claim 2
Independent Claim
101 words
THE METHOD OF CEMENTING OPTICAL ELEMENTS WHICH COMPRISES: MIXING WITH ABOUT 1 PER CENT BY VOLUME OF TERTIARY BUTYL PERBENZOATE A LIQUID CEMENT CONSISTING OF BETWEEN 60 TO 80 PARTS BY WEIGHT OF A STYRENE FRACTION MADE UP OF ABOUT 12 PARTS BY WEIGHT OF POLYSTYRENE AND ABOUT 48 PARTS BY WEIGHT OF STYRENE, BETWEEN 40 TO 20 PARTS BY WEIGHT OF ALPHA-METHYL STYRENE, AND FROM 1 TO 5 PARTS BY WEIGHT OF DIVINYL BENZENE; APPLYING THIS MIXTURE TO THE OPTICAL ELEMENTS; AND BAKING THIS ASSEMBLY FOR BETWEEN 16 TO 40 HOURS AT A TEMPERATURE OF BETWEEN 110* TO 150* C.
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) | 1959-02-06 | 1959-08-08 | 1960-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-06 | 1963-08-08 | 1964-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-06 | 1967-08-08 | 1968-02-07 | $7700.00 | Window Closed / Lapsed |