US2994635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fortified tall oil rosin paper sizes
Assignee: Monsanto Chemicals Ltd
•
Filing: 1957-12-13
•
Granted: 1961-08-01
•
Expires: 1977-12-13
Abstract
No abstract record available.
Inventors
- 👤 Eric T Reaville
- 👤 Joseph P O'brien
- 👤 Laurence P Russe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:41
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/62; C; C11; C11D; C11D15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
IN A PROCESS FOR THE PREPARATION OF A FORTIFIED TALL OIL ROSIN SIZE, THE STEPS COMPRISING HEATING AT TEMPERATURES ABOVE THE SOFTENING POINT OF THE TALL OIL ROSIN, 100 PARTS BY WEIGHT OF TALL OIL ROSIN WITH FROM ABOUT 0.5 TO ABOUT 8 PARTS BY WEIGHT OF FORMALDEHYDE AND UP TO ABOUT 10 PARTS BY WEIGHT OF FURMARIC ACID.
Claim 2
Dependent Claim
59 words
IN A PROCESS FOR THE PREPARATION OF A FORTIFIED TALL OIL ROSIN SIZE, THE STEPS COMPRISING HEATING AT TEMPERATURES ABOVE THE SOFTENING POINT OF THE TALL OIL ROSIN, 100 PARTS BY WEIGHT OF TALL OIL ROSIN WITH FROM ABOUT 0.5 TO ABOUT 8 PARTS BY WEIGHT OF FORMALDEHYDE AND UP TO ABOUT 10 PARTS BY WEIGHT OF FURMARIC ACID.
References Cited (Backward Citations)
US1366023A
Cited
US1807483A
Cited
US2299312A
Cited
US2309346A
Cited
US2628918A
Cited
US2684300A
Cited
US2572071A
Cited
US2721504A
Cited
US2659718A
Cited
US2720514A
Cited
US2771464A
Cited
US2776275A
Cited
US2934468A
Cited
US2872315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |