US3222678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas seal
Assignee: 3M Co
•
Filing: 1964-02-10
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Granted: 1965-12-07
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Expires: 1984-02-10
Abstract
No abstract record available.
Inventors
- 👤 Derrick A Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:34
CPC Classifications
G; G11; G11B; G11B11/00; G11B11/03; G11B15/00; G11B15/60; G11B15/62; G11B15/64; H; H01; H01J; H01J29/00; H01J29/86; H01J29/865; H01J29/866; H01J37/00; H01J37/02; H01J37/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A PROCESS OF TREATING ONE SURFACE OF A WEB IN THE PRESENCE OF AT LEAST A PARTIAL VACUUM WHICH COMPRISES DRAWING AT LEAST A PARTIAL VACUUM ON AN ENCLOSED TREATING CHAMBER HAVING A RELATIVELY NARROW ELONGATE TREATMENT APERTURE THEREIN, CONTINUOUSLY PASSING SAID WEB ACROSS A SMOOTH SEALING LIP WHICH SURROUNDS SAID APERTURE, DRAWING AT LEAST A PARTIAL VACUUM ON THE SURFACE OF SAID WEB WHICH IS TO BE TREATED THROUGH A SECOND APERTURE ADJACENT TO SAID SEALING LIP AND SEPARATE FROM THE TREATMENT APERTURE THEREBY CREATING A SEAL BETWEEN SAID TREATMENT APERTURE AND THE ATMOSPHERE BY MEANS OF SAID WEB, AND TREATING THE PORTION OF SAID WEB WHICH CROSSES SAID TREATMENT APERTURE AND IS EXPOSED TO SAID TREATING CHAMBER.
Claim 2
Dependent Claim
119 words
A PROCESS OF TREATING ONE SURFACE OF A WEB IN THE PRESENCE OF AT LEAST A PARTIAL VACUUM WHICH COMPRISES DRAWING AT LEAST A PARTIAL VACUUM ON AN ENCLOSED TREATING CHAMBER HAVING A RELATIVELY NARROW ELONGATE TREATMENT APERTURE THEREIN, CONTINUOUSLY PASSING SAID WEB ACROSS A SMOOTH SEALING LIP WHICH SURROUNDS SAID APERTURE, DRAWING AT LEAST A PARTIAL VACUUM ON THE SURFACE OF SAID WEB WHICH IS TO BE TREATED THROUGH A SECOND APERTURE ADJACENT TO SAID SEALING LIP AND SEPARATE FROM THE TREATMENT APERTURE THEREBY CREATING A SEAL BETWEEN SAID TREATMENT APERTURE AND THE ATMOSPHERE BY MEANS OF SAID WEB, AND TREATING THE PORTION OF SAID WEB WHICH CROSSES SAID TREATMENT APERTURE AND IS EXPOSED TO SAID TREATING CHAMBER.
References Cited (Backward Citations)
US1736456A
Cited
US1843572A
Cited
US2676868A
Cited
US2925312A
Cited
US3063050A
Cited
US3205301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |