US3435190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for perforating film
Assignee: WR Grace and Co
•
Filing: 1967-06-27
•
Granted: 1969-03-25
•
Expires: 1987-06-27
Abstract
No abstract record available.
Inventors
- 👤 Henry G Schirmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:39
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/26; B26F1/28; B26F1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2763759A
Cited
US3017486A
Cited
DE1105699B
Cited
US3098143A
Cited
US3281347A
Cited
US3308045A
Cited
US3282833A
Cited
US3348022A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |