US4183989B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
US4183989B1 - - Google Patents
Assignee: Portals Ltd
•
Filing: 1977-11-29
•
Granted: 1990-05-08
•
Expires: 1997-11-29
Abstract
No abstract record available.
Inventors
- 👤 J Tooth Alan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:09
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/40; D21H21/44; D21H21/48; G; G07; G07D; G07D7/00; G07D7/02; G07D7/026; G07D7/04; G07D7/06; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10S428/916; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24909; Y10T428/24917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |