Patent US3497916A successfully refreshed from Google Patents.
US3497916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming valve pockets in plastic film
Assignee: Reifenhauser KG
•
Filing: 1966-01-07
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Granted: 1970-03-03
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Expires: 1986-01-07
Abstract
No abstract record available.
Inventors
- 👤 Friedrich Reifenhauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:32
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/74; B31B70/81; B31B70/84; B31B70/855; B31B70/857; B31B2160/00; B31B2160/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2962758A
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US2968064A
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US3180776A
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US3238565A
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US3268952A
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US3267523A
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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) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |