Patent US3535955A successfully refreshed from Google Patents.
US3535955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flat and rotary die cut dies
Assignee: Hallmark Cards Inc
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Filing: 1968-02-21
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Granted: 1970-10-27
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Expires: 1988-02-21
Abstract
No abstract record available.
Inventors
- 👤 Stanley W Otto
- 👤 Seth W Warrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:40
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/28; B23P15/40; B23P15/406; B05; B05C; B05C17/00; B05C17/06; G; G03; G03F; G03F7/00; G03F7/0017
Claims Analysis
Total Claims: 0
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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) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |