Patent US3737364A successfully refreshed from Google Patents.
US3737364A
Expired / Lapsed
US
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Masks for slide transparencies
Assignee: Individual
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Filing: 1971-09-15
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Granted: 1973-06-05
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Expires: 1991-09-15
Abstract
Abstract A plurality of foil masks have pressure-sensitive adhesive surfaces releasably secured to a cardboard backing to hold the masks in intersecting rows and columns on the backing. Each mask has a central opening surrounding a similarly shaped-foil cut out, which is removed from the opening when the mask is applied to a slide. The apparatus is adapted to ultrasonically slit, weld or emboss wide sheet material, for instance slitting sheet material to blanket size, while simultaneously sealing the cut edges as such sheet material is taken from a loom.
Inventors
- 👤 W Heindl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:22
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/28; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/149; Y10T428/1495; Y10T428/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |