Patent US7155560B2 successfully refreshed from Google Patents.
Patent US6184922B1 successfully refreshed from Google Patents.
US3309221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface activation of passive polymers and articles produced thereby
Assignee: 3M Co
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Filing: 1963-03-25
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Granted: 1967-03-14
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Expires: 1983-03-25
Abstract
No abstract record available.
Inventors
- 👤 Gordon R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:00
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/14; B29C59/16; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0827; B29K; B29K2027/00; B29K2027/12; B29K2995/00; B29K2995/0018; B29K2995/0026; B29L; B29L2007/00; B29L2007/008; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2809; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
THE METHOD OF ACTIVATING A PASSIVE HYDROGEN-FREE FLUOROCARBON POLYMER SURFACE TO PROVIDE INCREASED RECEPTIVITY OF SAID SURFACE TO ADHESION WITH ADHESIVES AND OTHER OVERCOATINGS WHICH COMPRISES SUBJECTING SAID POLYMER SURFACE TO A VACUUM INDUCED LOW-PRESSURE ELECTRICAL GLOW DISCHARGE GENERATED AT A CURRENT DENSITY RANGE OF 10**-3 AND 10**-1 AMPERES PER SQUARE CM. WITH PRESSURE-DISTANCE VALUES BETWEEN ELECTRODES OF ABOUT 2 TO 20 MM. HG CM., SAID DISCHARGE EMITTING ULTRAVIOLET IRRADIATION OF WAVELENGTHS OF ABOUT 1800 A. AND SHORTER, SAID POLYMER SURFACE BEING IN THE PATH OF SAID IRRADIATION AND IN AN OXYGENATED ATMOSPHERE HAVING INSUFFICIENT OXYGEN PRESENT TO ABSORB SAID SHORT WAVE ULTRAVIOLET IRRADIATION BEFORE IMPINGEMENT THEREOF ON SAID POLYMER SURFACE, SAID IRRADIATION BEING FOR A PERIOD OF TIME SUFFICIENT TO ACTIVATE SAID POLYMER SURFACE.
Claim 2
Independent Claim
125 words
THE METHOD OF ACTIVATING A PASSIVE HYDROGEN-FREE FLUOROCARBON POLYMER SURFACE TO PROVIDE INCREASED RECEPTIVITY OF SAID SURFACE TO ADHESION WITH ADHESIVES AND OTHER OVERCOATINGS WHICH COMPRISES SUBJECTING SAID POLYMER SURFACE TO A VACUUM INDUCED LOW-PRESSURE ELECTRICAL GLOW DISCHARGE GENERATED AT A CURRENT DENSITY RANGE OF 10**-3 AND 10**-1 AMPERES PER SQUARE CM. WITH PRESSURE-DISTANCE VALUES BETWEEN ELECTRODES OF ABOUT 2 TO 20 MM. HG CM., SAID DISCHARGE EMITTING ULTRAVIOLET IRRADIATION OF WAVELENGTHS OF ABOUT 1800 A. AND SHORTER, SAID POLYMER SURFACE BEING IN THE PATH OF SAID IRRADIATION AND IN AN OXYGENATED ATMOSPHERE HAVING INSUFFICIENT OXYGEN PRESENT TO ABSORB SAID SHORT WAVE ULTRAVIOLET IRRADIATION BEFORE IMPINGEMENT THEREOF ON SAID POLYMER SURFACE, SAID IRRADIATION BEING FOR A PERIOD OF TIME SUFFICIENT TO ACTIVATE SAID POLYMER SURFACE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |