US3068937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Draw closure
Assignee: Individual
•
Filing: 1960-01-04
•
Granted: 1962-12-18
•
Expires: 1980-01-04
Abstract
No abstract record available.
Inventors
- 👤 Andrew B Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:01
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/02; E06B9/08; E06B9/11; E06B9/115; E06B9/24; E06B9/40; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0997
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US618831A
Cited
US1317579A
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US907493A
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US1698695A
Cited
US1934103A
Cited
US1885756A
Cited
US1784375A
Cited
US2352609A
Cited
US2406272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |