US3676289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Techniques for forming seals between polyethylene and fluorocarbon polymers
Assignee: AT&T Inc
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Filing: 1970-04-29
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Granted: 1972-07-11
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Expires: 1990-04-29
Abstract
Abstract A TECHNIQUE FOR PREPARING PLASTIC LAMINATES COMPRISING A LOW SURFACE ENERGY POLYMER BONDED WITH POLYETHYLENE INVOLVES MODIFYING THE SURFACE OF THE POLYMER TO EFFECT AN INCREASE IN THE STRENGTH OF ITS SURFACE LAYER AND SUBSEQUENTLY MELTING POLYETHYLENE UPON THE RESULTANT MODIFIED POLYMER.
Inventors
- 👤 Katsuyuki Hara
- 👤 Harold Schonhorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:52
CPC Classifications
B; B29; B29D; B29D7/00; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/32; B32B27/322; C; C08; C08J; C08J5/00; C08J5/12; B32B2327/00; B32B2327/12; B32B2327/18; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
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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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |