US3448939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-erecting spiral tube device
Assignee: Ametek Inc
•
Filing: 1967-12-04
•
Granted: 1969-06-10
•
Expires: 1987-12-04
Abstract
No abstract record available.
Inventors
- 👤 William J Bieber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:31
CPC Classifications
B; B65; B65H; B65H81/00; B65H81/06; B65H81/08; F; F16; F16H; F16H19/00; F16H19/02; F16H19/06; F16H19/064; Y; Y10; Y10S; Y10S242/00; Y10S242/917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US355413A
Cited
US3007239A
Cited
US3144215A
Cited
US3144104A
Cited
US3300042A
Cited
US3380204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |