US3499072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming cylindrical sleeves from thermoplastic resin sheets
Assignee: Lundvall and Associates
•
Filing: 1967-05-03
•
Granted: 1970-03-03
•
Expires: 1987-05-03
Abstract
No abstract record available.
Inventors
- 👤 Robert W Helling
- 👤 Herbert R Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:12
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/32; B29C53/02; B29C53/04; B29C53/043; B29C69/00; B29C69/001; B29C69/002; B29C69/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3280240A
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US3414649A
Cited
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 |