Patent US3341312A successfully refreshed from Google Patents.
US3341312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of supporting a thermorlastic sheet with gas
Assignee: PPG Industries Inc
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Filing: 1964-06-04
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Granted: 1967-09-12
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Expires: 1984-06-04
Abstract
No abstract record available.
Inventors
- 👤 Wheeler Robert William
- 👤 Jr Charles Richard Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:17
CPC Classifications
C; C03; C03B; C03B27/00; C03B27/04; C03B27/0417; C03B23/00; C03B23/02; C03B23/023; C03B23/03; C03B23/031; C03B23/0315; C03B27/0413; C03B27/052; C03B29/00; C03B29/02; C03B29/025; C03B35/00; C03B35/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
63 words
A METHOD OF SUPPORTING A FLAT SHEET IN STABLE POSITION COMPRISING ENGAGING THE BOTTOM EDGE SURFACE OF SAID SHEET WITH SPACED SUPPORT ELEMENTS AND DIRECTING FLUID ONLY BETWEEN SAID FLAT SHEET AND A CURVED WALL SPACED CLOSELY AND IN CONVEX RELATION TO SAID SHEET AT A PRESSURE SUFFICIENT TO PRODUCE A VENTURI EFFECT TO HOLD THE SHEET CLOSE TO SAID WALL WITHOUT TOUCHING.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |