Patent US4133642A successfully refreshed from Google Patents.
Patent US3303469A successfully refreshed from Google Patents.
Patent US2455174A successfully refreshed from Google Patents.
US2455174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free fall fiber
Assignee: EIDP Inc
•
Filing: 1946-10-09
•
Granted: 1948-11-30
•
Expires: 1966-10-09
Abstract
No abstract record available.
Inventors
- 👤 Ira V Hitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:51
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/04; D04; D04H; D04H3/00; D04H3/08; D04H3/16; Y; Y10; Y10S; Y10S264/00; Y10S264/75
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1951-11-30 | 1952-05-31 | 1952-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-30 | 1956-05-31 | 1956-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-30 | 1960-05-31 | 1960-11-30 | $7700.00 | Window Closed / Lapsed |