US3680968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of correcting typewritten impressions
Assignee: Individual
•
Filing: 1970-02-24
•
Granted: 1972-08-01
•
Expires: 1990-02-24
Abstract
Abstract A method of correcting a typewritten impression comprising the steps of centering an applicator containing a correction liquid and having a liquid outlet and a valve head extending through the liquid outlet for controlling flow of correction liquid through the liquid outlet in overlying relationship relative to a typed impression with said valve head engaging substantially the center of said typewritten impression. Therefore, said correction liquid is ejected from said applicator to form a disc of correction liquid having a ring of greatest thickness adjacent the periphery of said disc and surrounding the impression to be corrected, and then allowing said disc of correction liquid to dry.
Inventors
- 👤 Gilbert Schwartzman
- 👤 Robert Glenn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:25
CPC Classifications
B; B43; B43K; B43K5/00; B43K5/18; B43K5/1818; B43K5/1827; B43K5/1836; B43K5/1845; B43L; B43L19/00; B43L19/0018
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
137 words
A method of correcting a typewritten impression on a substrate material, comprising the steps of centering an applicator containing a correction liquid and having a liquid outlet and a valve head extending through said liquid outlet for controlling flow of correction liquid through said liquid outlet in overlying relationship relative to a typed impression with said valve head engaging substantially the center of said typewritten impression and with said liquid outlet spaced from the substrate material, thereafter ejecting said correction liquid from said applicator and forcing said valve head against said typewritten impression in a pulsating manner to form a disc of correction liquid on said substrate material having a ring of greatest thickness adjacent the periphery of said disc and surrounding the impression to be corrected, and then allowing said disc of correction liquid to dry.
Claim 2
Independent Claim
137 words
A method of correcting a typewritten impression on a substrate material, comprising the steps of centering an applicator containing a correction liquid and having a liquid outlet and a valve head extending through said liquid outlet for controlling flow of correction liquid through said liquid outlet in overlying relationship relative to a typed impression with said valve head engaging substantially the center of said typewritten impression and with said liquid outlet spaced from the substrate material, thereafter ejecting said correction liquid from said applicator and forcing said valve head against said typewritten impression in a pulsating manner to form a disc of correction liquid on said substrate material having a ring of greatest thickness adjacent the periphery of said disc and surrounding the impression to be corrected, and then allowing said disc of correction liquid to dry.
Claim 3
Dependent Claim
25 words
A method according to claim 1, wherein said correction liquid contains a thixotropic agent so that pulsating of said valve head will form said ring.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |