US3254346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic printer and watch timer
Assignee: Individual
•
Filing: 1962-05-21
•
Granted: 1966-05-31
•
Expires: 1982-05-21
Abstract
No abstract record available.
Inventors
- 👤 Donald K Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:46
CPC Classifications
G; G04; G04D; G04D7/00; G04D7/12; G04D7/1207; G04D7/1214; G04D7/1221
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A METHOD OF PRODUCING SHARPLY DELINEATED ARC BURNS ON A TAPE, WHICH METHOD COMPRISES PASSING THROUGH A SPARK GAP, SEPARATELY IMPRESSING AN IONIZING CURRENT POTENTIAL AND A MARKING CURRENT POTENTIAL ACROSS SAID GAP, AND THE MARKING CURRENT HAVING VOLTAGE TOO LOW TO ALLOW IT TO TRAVERSE THE GAP BY ITSELF, EXCLUDING MARKING CURRENT FROM THE IONIZING CURRENT SOURCE AT LEAST UP TO THE
Claim 2
Independent Claim
63 words
A METHOD OF PRODUCING SHARPLY DELINEATED ARC BURNS ON A TAPE, WHICH METHOD COMPRISES PASSING THROUGH A SPARK GAP, SEPARATELY IMPRESSING AN IONIZING CURRENT POTENTIAL AND A MARKING CURRENT POTENTIAL ACROSS SAID GAP, AND THE MARKING CURRENT HAVING VOLTAGE TOO LOW TO ALLOW IT TO TRAVERSE THE GAP BY ITSELF, EXCLUDING MARKING CURRENT FROM THE IONIZING CURRENT SOURCE AT LEAST UP TO THE
References Cited (Backward Citations)
US2067140A
Cited
US2282924A
Cited
US2235385A
Cited
US2421781A
Cited
US2425613A
Cited
GB624738A
Cited
US2551466A
Cited
US2565008A
Cited
GB654310A
Cited
US2560247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |