US3540981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Web formation between a pair of foraminous belts
Assignee: JOHN S FINNILA
•
Filing: 1969-02-20
•
Granted: 1970-11-17
•
Expires: 1989-02-20
Abstract
No abstract record available.
Inventors
- 👤 John S Finnila
- 👤 Edgar J Justus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:35
CPC Classifications
D; D21; D21F; D21F9/00; D21F9/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2934140A
Cited
US2928464A
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US3010510A
Cited
US3025909A
Cited
US3186902A
Cited
US3215594A
Cited
US3311533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |