Patent US3267823A successfully refreshed from Google Patents.
US3267823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stepping stones
Assignee: Individual
•
Filing: 1963-06-10
•
Granted: 1966-08-23
•
Expires: 1983-06-10
Abstract
No abstract record available.
Inventors
- 👤 John R Macrae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:48
CPC Classifications
E; E01; E01C; E01C5/00; E01C5/20; E01C2201/00; E01C2201/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US776419A
Cited
US1336789A
Cited
US1557165A
Cited
US1796973A
Cited
US1778927A
Cited
US1969729A
Cited
FR743461A
Cited
US2666373A
Cited
US2699982A
Cited
US3082488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |