US3521802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Web guide members
Assignee: Masson Scott Thrissell Engineering Ltd
•
Filing: 1968-05-10
•
Granted: 1970-07-28
•
Expires: 1988-05-10
Abstract
No abstract record available.
Inventors
- 👤 Walter H Bossons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:28
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/24; B65H2401/00; B65H2401/20; B65H2401/242; B65H2406/00; B65H2406/10; B65H2406/11; B65H2406/111
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3318640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |