US3018870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proportional spacing mechanism
Assignee: Royal Mcbee Corp
•
Filing: 1959-08-18
•
Granted: 1962-01-30
•
Expires: 1979-08-18
Abstract
No abstract record available.
Inventors
- 👤 Harry L Lambert
- 👤 Hartford West
- 👤 Paul F Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:48
CPC Classifications
B; B41; B41J; B41J19/00; B41J19/18; B41J19/34; B41J19/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1054875A
Cited
US1286186A
Cited
US2303878A
Cited
US2439470A
Cited
US2518166A
Cited
US2794530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-29 | 1965-07-31 | 1966-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-29 | 1969-07-31 | 1970-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-29 | 1973-07-31 | 1974-01-30 | $7700.00 | Window Closed / Lapsed |