Patent US3075869A successfully refreshed from Google Patents.
US3075869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacturing method of the sodium nitrate polarizers
Assignee: Individual
•
Filing: 1959-04-03
•
Granted: 1963-01-29
•
Expires: 1979-04-03
Abstract
No abstract record available.
Inventors
- 👤 Yamaguti Tasaburo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:53
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/28; G02B27/283
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A METHOD OF MANUFACTURING A SODIUM NITRATE POLARIZING PRISM WHICH CONSISTS IN PLACING A SMALL AMOUNT OF SODIUM NITRATE ON A MICA SHEET, PLACING THEREON TWO GLASS PRISMS ARRANGED TO FACE EACH OTHER, PLACING THE MICA SHEET ON A BRASS PLATE, HEATING THE SAME ABOVE THE MELTING POINT OF SODIUM NITRATE WHEREBY A SMALL AMOUNT OF LIQUID OF SODIUM NITRATE THUS MELTED PROCEEDS FROM THE MELT ON THE MICA SHEET INTO THE NARROW SPACE BETWEEN THE TWO GLASS PRISMS BECAUSE OF CAPILLARY ACTION, THEN COOLING THE SAME TO FORM A SINGLE CRYSTAL BETWEEN THE TWO GLASS PRISMS AND BONDING THEM INTO A POLARIZATION PRISM.
Claim 2
Independent Claim
104 words
A METHOD OF MANUFACTURING A SODIUM NITRATE POLARIZING PRISM WHICH CONSISTS IN PLACING A SMALL AMOUNT OF SODIUM NITRATE ON A MICA SHEET, PLACING THEREON TWO GLASS PRISMS ARRANGED TO FACE EACH OTHER, PLACING THE MICA SHEET ON A BRASS PLATE, HEATING THE SAME ABOVE THE MELTING POINT OF SODIUM NITRATE WHEREBY A SMALL AMOUNT OF LIQUID OF SODIUM NITRATE THUS MELTED PROCEEDS FROM THE MELT ON THE MICA SHEET INTO THE NARROW SPACE BETWEEN THE TWO GLASS PRISMS BECAUSE OF CAPILLARY ACTION, THEN COOLING THE SAME TO FORM A SINGLE CRYSTAL BETWEEN THE TWO GLASS PRISMS AND BONDING THEM INTO A POLARIZATION PRISM.
References Cited (Backward Citations)
US2104949A
Cited
US2199227A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |