US3351697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stretching of polymer foils
Assignee: Lever Brothers Co
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Filing: 1964-07-06
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Granted: 1967-11-07
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Expires: 1984-07-06
Abstract
No abstract record available.
Inventors
- 👤 Hufnagel Walter
- 👤 Doboczky Zoltan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:32
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/04; B29C55/06; B29C55/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
PROCESS FOR CONTINUOUS STRETCHING AND ELONGATION OF SYNTHETIC POLYMER FILM, COMPRISING THE STEPS OF CONTINUOUSLY FEEDING A WEB OF POLYMER FILM TO A STRETCHING ZONE AT A PRE-DETERMINED FEED-IN RATE, ROLLER-GUIDING THE WEB OVER ITS FULL WIDTH TO FOLLOW A ZIG-ZAG PATH THROUGH SAID STRETCHING ZONE BY A REVERSE TURNING OF THE WEB THROUGH MULTIPLE CIRCULAR ARCS OF RADIUS LESS THAN 20 MM., AND
Claim 2
Dependent Claim
64 words
PROCESS FOR CONTINUOUS STRETCHING AND ELONGATION OF SYNTHETIC POLYMER FILM, COMPRISING THE STEPS OF CONTINUOUSLY FEEDING A WEB OF POLYMER FILM TO A STRETCHING ZONE AT A PRE-DETERMINED FEED-IN RATE, ROLLER-GUIDING THE WEB OVER ITS FULL WIDTH TO FOLLOW A ZIG-ZAG PATH THROUGH SAID STRETCHING ZONE BY A REVERSE TURNING OF THE WEB THROUGH MULTIPLE CIRCULAR ARCS OF RADIUS LESS THAN 20 MM., AND
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |